diff --git a/packages/adapt-dpi/test/index.ts b/packages/adapt-dpi/test/index.ts
index 91f33222c8..0520c3ce1d 100644
--- a/packages/adapt-dpi/test/index.ts
+++ b/packages/adapt-dpi/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("adapt-dpi", {});
diff --git a/packages/adjacency/test/binary.ts b/packages/adjacency/test/binary.ts
index 440d3194ad..a18b43ecd7 100644
--- a/packages/adjacency/test/binary.ts
+++ b/packages/adjacency/test/binary.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { defAdjBitMatrix, Edge } from "../src";
+import { defAdjBitMatrix, Edge } from "../src/index.js"
 
 const edges: Edge[] = [
     [2, 3],
diff --git a/packages/adjacency/test/list.ts b/packages/adjacency/test/list.ts
index 3f4f1303d3..bc1336d9f4 100644
--- a/packages/adjacency/test/list.ts
+++ b/packages/adjacency/test/list.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { defAdjList } from "../src";
+import { defAdjList } from "../src/index.js"
 
 group("adjacency (list)", {
     directed: () => {
diff --git a/packages/adjacency/test/mst.ts b/packages/adjacency/test/mst.ts
index 81643c5573..07ca065724 100644
--- a/packages/adjacency/test/mst.ts
+++ b/packages/adjacency/test/mst.ts
@@ -1,7 +1,7 @@
 import { comparator2, distSq } from "@thi.ng/vectors";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { mst } from "../src";
+import { mst } from "../src/index.js"
 
 group("unionfind", {
     mst: () => {
diff --git a/packages/adjacency/test/sparse.ts b/packages/adjacency/test/sparse.ts
index 8b799e3d43..f927fd85b5 100644
--- a/packages/adjacency/test/sparse.ts
+++ b/packages/adjacency/test/sparse.ts
@@ -1,7 +1,7 @@
 import type { Pair } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defAdjMatrix } from "../src";
+import { defAdjMatrix } from "../src/index.js"
 
 const edges: Pair<number, number>[] = [
     [2, 3],
diff --git a/packages/api/test/mixins.ts b/packages/api/test/mixins.ts
index b5f0464926..e821aaf92e 100644
--- a/packages/api/test/mixins.ts
+++ b/packages/api/test/mixins.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { Event, EVENT_ALL, INotify, INotifyMixin, Listener } from "../src";
+import { Event, EVENT_ALL, INotify, INotifyMixin, Listener } from "../src/index.js";
 
 group("mixins", {
     INotify: () => {
diff --git a/packages/args/test/index.ts b/packages/args/test/index.ts
index cc6a73b98c..8cd81edd77 100644
--- a/packages/args/test/index.ts
+++ b/packages/args/test/index.ts
@@ -18,7 +18,7 @@ import {
     string,
     tuple,
     Tuple,
-} from "../src";
+} from "../src/index.js"
 
 group("args", {
     "basic / string": () => {
diff --git a/packages/arrays/test/binary-search.ts b/packages/arrays/test/binary-search.ts
index d96a246893..d6c8b1c567 100644
--- a/packages/arrays/test/binary-search.ts
+++ b/packages/arrays/test/binary-search.ts
@@ -1,7 +1,7 @@
 import type { FnO } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { binarySearch, bsEQ, bsGE, bsGT, bsLE, bsLT } from "../src";
+import { binarySearch, bsEQ, bsGE, bsGT, bsLE, bsLT } from "../src/index.js"
 
 const src = [10, 20, 30, 40];
 const tests = [5, 10, 15, 20, 25, 45];
diff --git a/packages/arrays/test/iterator.ts b/packages/arrays/test/iterator.ts
index b65549ad68..1a2720a732 100644
--- a/packages/arrays/test/iterator.ts
+++ b/packages/arrays/test/iterator.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { arrayIterator } from "../src";
+import { arrayIterator } from "../src/index.js"
 
 group("arrayIterator", {
     basics: () => {
diff --git a/packages/arrays/test/shuffle.ts b/packages/arrays/test/shuffle.ts
index f8cdae4b38..52fbe6f879 100644
--- a/packages/arrays/test/shuffle.ts
+++ b/packages/arrays/test/shuffle.ts
@@ -1,7 +1,7 @@
 import { XsAdd } from "@thi.ng/random";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { shuffle, shuffleRange } from "../src";
+import { shuffle, shuffleRange } from "../src/index.js"
 
 group("arrays", {
     shuffle: () => {
diff --git a/packages/arrays/test/sort-cached.ts b/packages/arrays/test/sort-cached.ts
index d76c6b0d86..dd31e21656 100644
--- a/packages/arrays/test/sort-cached.ts
+++ b/packages/arrays/test/sort-cached.ts
@@ -1,7 +1,7 @@
 import { compare, reverse } from "@thi.ng/compare";
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { sortByCachedKey } from "../src";
+import { sortByCachedKey } from "../src/index.js"
 
 group("sortCached", {
     "key fn": () => {
diff --git a/packages/associative/test/difference.ts b/packages/associative/test/difference.ts
index 8c2fe2beba..12c54a3634 100644
--- a/packages/associative/test/difference.ts
+++ b/packages/associative/test/difference.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ArraySet, difference } from "../src";
+import { ArraySet, difference } from "../src/index.js"
 
 group("difference", {
     "native (numbers)": () => {
diff --git a/packages/associative/test/intersection.ts b/packages/associative/test/intersection.ts
index 152a9fe9a8..a341db2665 100644
--- a/packages/associative/test/intersection.ts
+++ b/packages/associative/test/intersection.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ArraySet, intersection } from "../src";
+import { ArraySet, intersection } from "../src/index.js"
 
 group("intersection", {
     "native (numbers)": () => {
diff --git a/packages/associative/test/join.ts b/packages/associative/test/join.ts
index dcae21a3aa..f7efadadf3 100644
--- a/packages/associative/test/join.ts
+++ b/packages/associative/test/join.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ArraySet, join, joinWith } from "../src";
+import { ArraySet, join, joinWith } from "../src/index.js"
 
 group("join", {
     simple: () => {
diff --git a/packages/associative/test/merge.ts b/packages/associative/test/merge.ts
index 9c73bae52d..8a868884c5 100644
--- a/packages/associative/test/merge.ts
+++ b/packages/associative/test/merge.ts
@@ -7,7 +7,7 @@ import {
     mergeApplyMap,
     mergeApplyObj,
     mergeDeepObj,
-} from "../src";
+} from "../src/index.js"
 
 group("mergeApply", {
     map: () => {
diff --git a/packages/associative/test/multi-trie.ts b/packages/associative/test/multi-trie.ts
index 7a55e321ee..d63b6b37d3 100644
--- a/packages/associative/test/multi-trie.ts
+++ b/packages/associative/test/multi-trie.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { MultiTrie } from "../src";
+import { MultiTrie } from "../src/index.js"
 
 let root: MultiTrie<string, string>;
 
diff --git a/packages/associative/test/object.ts b/packages/associative/test/object.ts
index c41938ebc0..4fdc419047 100644
--- a/packages/associative/test/object.ts
+++ b/packages/associative/test/object.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { renameTransformedKeys } from "../src";
+import { renameTransformedKeys } from "../src/index.js"
 
 group("object ops", {
     renameTransformedKeys: () => {
diff --git a/packages/associative/test/sorted-map.ts b/packages/associative/test/sorted-map.ts
index 993bfe35d0..d388e3311d 100644
--- a/packages/associative/test/sorted-map.ts
+++ b/packages/associative/test/sorted-map.ts
@@ -3,7 +3,7 @@ import { equiv } from "@thi.ng/equiv";
 import { range, repeat, zip } from "@thi.ng/transducers";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defSortedMap, SortedMap } from "../src";
+import { defSortedMap, SortedMap } from "../src/index.js"
 
 let m: SortedMap<any, any>;
 
diff --git a/packages/associative/test/sparse-set.ts b/packages/associative/test/sparse-set.ts
index 92345188f6..bcce51b1e9 100644
--- a/packages/associative/test/sparse-set.ts
+++ b/packages/associative/test/sparse-set.ts
@@ -2,7 +2,7 @@ import { isSet } from "@thi.ng/checks";
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defSparseSet, SparseSet16, SparseSet32, SparseSet8 } from "../src";
+import { defSparseSet, SparseSet16, SparseSet32, SparseSet8 } from "../src/index.js"
 
 let set: SparseSet8;
 
diff --git a/packages/associative/test/trie-map.ts b/packages/associative/test/trie-map.ts
index a8488df9aa..d2e67546b9 100644
--- a/packages/associative/test/trie-map.ts
+++ b/packages/associative/test/trie-map.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { TrieMap } from "../src";
+import { TrieMap } from "../src/index.js"
 
 let root: TrieMap<string>;
 
diff --git a/packages/associative/test/union.ts b/packages/associative/test/union.ts
index f86b304214..d6983262d2 100644
--- a/packages/associative/test/union.ts
+++ b/packages/associative/test/union.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { ArraySet, union } from "../src";
+import { ArraySet, union } from "../src/index.js"
 
 group("union", {
     "native (numbers)": () => {
diff --git a/packages/atom/test/atom.ts b/packages/atom/test/atom.ts
index 338c3268d2..9b094f733c 100644
--- a/packages/atom/test/atom.ts
+++ b/packages/atom/test/atom.ts
@@ -1,7 +1,7 @@
 import { isNumber } from "@thi.ng/checks";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Atom } from "../src";
+import { Atom } from "../src/index.js"
 
 let a: Atom<any>;
 
diff --git a/packages/atom/test/cursor.ts b/packages/atom/test/cursor.ts
index 6fa1990985..6c7590ea07 100644
--- a/packages/atom/test/cursor.ts
+++ b/packages/atom/test/cursor.ts
@@ -1,7 +1,7 @@
 import { isNumber } from "@thi.ng/checks";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Atom, Cursor, defAtom, defCursor } from "../src";
+import { Atom, Cursor, defAtom, defCursor } from "../src/index.js"
 
 interface State {
     a: {
diff --git a/packages/atom/test/history.ts b/packages/atom/test/history.ts
index e45794dde6..7cb74b862e 100644
--- a/packages/atom/test/history.ts
+++ b/packages/atom/test/history.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { Atom, defCursor, defHistory } from "../src";
+import { Atom, defCursor, defHistory } from "../src/index.js"
 
 let a: Atom<any>;
 let add = (x: number) => x + 1;
diff --git a/packages/atom/test/transacted.ts b/packages/atom/test/transacted.ts
index a5fad02453..7c1200a10d 100644
--- a/packages/atom/test/transacted.ts
+++ b/packages/atom/test/transacted.ts
@@ -7,7 +7,7 @@ import {
     defTransacted,
     defView,
     Transacted,
-} from "../src";
+} from "../src/index.js"
 
 interface State {
     a: number;
diff --git a/packages/atom/test/view.ts b/packages/atom/test/view.ts
index b1f3db07cc..429eeb23e0 100644
--- a/packages/atom/test/view.ts
+++ b/packages/atom/test/view.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { Atom, defCursor, defView, IView, View } from "../src";
+import { Atom, defCursor, defView, IView, View } from "../src/index.js"
 
 interface State {
     a: number;
diff --git a/packages/base-n/test/index.ts b/packages/base-n/test/index.ts
index 688514efcb..636f51f7aa 100644
--- a/packages/base-n/test/index.ts
+++ b/packages/base-n/test/index.ts
@@ -9,7 +9,7 @@ import {
     BASE64,
     BASE85,
     IBase,
-} from "../src";
+} from "../src/index.js"
 
 group("base-n", {
     roundtrip: () => {
diff --git a/packages/bench/test/index.ts b/packages/bench/test/index.ts
index 7328879b79..bb24b57136 100644
--- a/packages/bench/test/index.ts
+++ b/packages/bench/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as bench from "../src";
+// import * as bench from "../src/index.js"
 
 group("bench", {});
diff --git a/packages/bencode/test/index.ts b/packages/bencode/test/index.ts
index 1f0948951f..05e8d436d6 100644
--- a/packages/bencode/test/index.ts
+++ b/packages/bencode/test/index.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { decode, encode } from "../src";
+import { decode, encode } from "../src/index.js"
 
 const src = { foo: [1, "a", { bar: "baz" }, [42.123]] };
 const src2 = { foo: new Uint8Array([0, 1, 2, 3, 255, 254, 253]) };
diff --git a/packages/binary/test/index.ts b/packages/binary/test/index.ts
index 60ad0ed063..7e41e154fd 100644
--- a/packages/binary/test/index.ts
+++ b/packages/binary/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as b from "../src";
+// import * as b from "../src/index.js"
 
 group("binary", {});
diff --git a/packages/bitfield/test/index.ts b/packages/bitfield/test/index.ts
index 6807cda32c..312744bf1b 100644
--- a/packages/bitfield/test/index.ts
+++ b/packages/bitfield/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as b from "../src";
+// import * as b from "../src/index.js"
 
 group("bitfield", {});
diff --git a/packages/bitstream/test/index.ts b/packages/bitstream/test/index.ts
index eee5bc648a..b0003c1e8a 100644
--- a/packages/bitstream/test/index.ts
+++ b/packages/bitstream/test/index.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import * as bits from "../src";
+import * as bits from "../src/index.js"
 
 let src = new Uint8Array([
     0xbe, 0xef, 0xde, 0xca, 0xfb, 0xad, 0xf0, 0x0b, 0xaa,
diff --git a/packages/cache/test/lru.ts b/packages/cache/test/lru.ts
index 2f838d3110..90b8e51cbe 100644
--- a/packages/cache/test/lru.ts
+++ b/packages/cache/test/lru.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { LRUCache } from "../src";
+import { LRUCache } from "../src/index.js"
 
 let c: LRUCache<string, number>;
 let evicts: any[];
diff --git a/packages/cache/test/mru.ts b/packages/cache/test/mru.ts
index 1c608c23cd..95bea5a565 100644
--- a/packages/cache/test/mru.ts
+++ b/packages/cache/test/mru.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { MRUCache } from "../src";
+import { MRUCache } from "../src/index.js"
 
 let c: MRUCache<string, number>;
 let evicts: any[];
diff --git a/packages/cache/test/tlru.ts b/packages/cache/test/tlru.ts
index 6f253020e5..206993e404 100644
--- a/packages/cache/test/tlru.ts
+++ b/packages/cache/test/tlru.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { TLRUCache } from "../src";
+import { TLRUCache } from "../src/index.js"
 
 let c: TLRUCache<string, number>;
 let evicts: any[];
diff --git a/packages/checks/test/index.ts b/packages/checks/test/index.ts
index 062b960c33..a5f1575d57 100644
--- a/packages/checks/test/index.ts
+++ b/packages/checks/test/index.ts
@@ -16,7 +16,7 @@ import {
     isSymbol,
     isTransferable,
     isTypedArray,
-} from "../src";
+} from "../src/index.js";
 
 group("checks", {
     existsAndNotNull: () => {
diff --git a/packages/color-palettes/test/index.ts b/packages/color-palettes/test/index.ts
index 983ad148e0..266f794836 100644
--- a/packages/color-palettes/test/index.ts
+++ b/packages/color-palettes/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("palettes", {});
diff --git a/packages/color/test/index.ts b/packages/color/test/index.ts
index f4fb4a9e96..77dd879de9 100644
--- a/packages/color/test/index.ts
+++ b/packages/color/test/index.ts
@@ -12,7 +12,7 @@ import {
     parseCss,
     rgb,
     srgb,
-} from "../src";
+} from "../src/index.js"
 
 group("color", {
     srgb: () => {
diff --git a/packages/colored-noise/test/index.ts b/packages/colored-noise/test/index.ts
index 598b26d24d..3d747fbc46 100644
--- a/packages/colored-noise/test/index.ts
+++ b/packages/colored-noise/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("colored-noise", {});
diff --git a/packages/compare/test/index.ts b/packages/compare/test/index.ts
index 0ac8bd569f..8ea31410bd 100644
--- a/packages/compare/test/index.ts
+++ b/packages/compare/test/index.ts
@@ -5,7 +5,7 @@ import {
     compareByKeys2,
     compareByKeys3,
     compareByKeys4,
-} from "../src";
+} from "../src/index.js"
 
 group("compare", {
     compareByKey: () => {
diff --git a/packages/compose/test/delay.ts b/packages/compose/test/delay.ts
index 07e6e31a83..ef5236d8fb 100644
--- a/packages/compose/test/delay.ts
+++ b/packages/compose/test/delay.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { delay } from "../src";
+import { delay } from "../src/index.js"
 
 group("delay", {
     "only executes once": () => {
diff --git a/packages/compose/test/juxt.ts b/packages/compose/test/juxt.ts
index b6e6090650..770440259b 100644
--- a/packages/compose/test/juxt.ts
+++ b/packages/compose/test/juxt.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { juxt } from "../src";
+import { juxt } from "../src/index.js"
 
 group("juxt", {
     "2-args": () => {
diff --git a/packages/compose/test/partial.ts b/packages/compose/test/partial.ts
index f3dead7bb1..4824b6e125 100644
--- a/packages/compose/test/partial.ts
+++ b/packages/compose/test/partial.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { partial } from "../src";
+import { partial } from "../src/index.js"
 
 const fn = (
     a: any,
diff --git a/packages/csp/test/async.ts b/packages/csp/test/async.ts
index 6aafdad0f8..103b7601ff 100644
--- a/packages/csp/test/async.ts
+++ b/packages/csp/test/async.ts
@@ -1,5 +1,5 @@
 import * as tx from "@thi.ng/transducers";
-import { Channel, PubSub } from "../src";
+import { Channel, PubSub } from "../src/index.js"
 
 async function pingpong() {
     async function ping(ch: Channel<number>) {
diff --git a/packages/csp/test/file.ts b/packages/csp/test/file.ts
index 621c56b879..deffd6f343 100644
--- a/packages/csp/test/file.ts
+++ b/packages/csp/test/file.ts
@@ -1,6 +1,6 @@
 import * as tx from "@thi.ng/transducers";
 import * as fs from "fs";
-import { Channel, Mult } from "../src";
+import { Channel, Mult } from "../src/index.js"
 
 // compose transducer to split source file into words
 // and filter out short strings
diff --git a/packages/csp/test/graph.ts b/packages/csp/test/graph.ts
index 5761ac9b04..ee10b86043 100644
--- a/packages/csp/test/graph.ts
+++ b/packages/csp/test/graph.ts
@@ -1,5 +1,5 @@
 import type { IObjectOf } from "@thi.ng/api";
-import { Channel, Mult } from "../src";
+import { Channel, Mult } from "../src/index.js"
 
 export interface Node {
     ins: IObjectOf<Channel<any>>;
diff --git a/packages/csp/test/node.ts b/packages/csp/test/node.ts
index db0680efe0..4be5554550 100644
--- a/packages/csp/test/node.ts
+++ b/packages/csp/test/node.ts
@@ -1,7 +1,7 @@
 import type { IEnable, IID, IObjectOf } from "@thi.ng/api";
 import { implementsFunction } from "@thi.ng/checks";
 import { map, Transducer } from "@thi.ng/transducers";
-import { Channel, IBuffer, IWriteableChannel, Mult } from "../src";
+import { Channel, IBuffer, IWriteableChannel, Mult } from "../src/index.js"
 
 export type NodeInput =
     | NodeInputSpec
diff --git a/packages/csv/test/format.ts b/packages/csv/test/format.ts
index b0708cf40e..83a2293eff 100644
--- a/packages/csv/test/format.ts
+++ b/packages/csv/test/format.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { formatCSV, formatFloat, zeroPad } from "../src";
+import { formatCSV, formatFloat, zeroPad } from "../src/index.js"
 
 group("format array", {
     header: () =>
diff --git a/packages/csv/test/parse.ts b/packages/csv/test/parse.ts
index 90a240f1fb..8fd130d14d 100644
--- a/packages/csv/test/parse.ts
+++ b/packages/csv/test/parse.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { parseCSV, parseCSVFromString } from "../src";
+import { parseCSV, parseCSVFromString } from "../src/index.js"
 
 group("parse", {
     header: () => {
diff --git a/packages/date/test/datetime.ts b/packages/date/test/datetime.ts
index efbcafc422..237736d602 100644
--- a/packages/date/test/datetime.ts
+++ b/packages/date/test/datetime.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { dateTime } from "../src";
+import { dateTime } from "../src/index.js"
 
 group("datetime", {
     "leap years": () => {
diff --git a/packages/date/test/format.ts b/packages/date/test/format.ts
index dd670fa010..b38c7bd784 100644
--- a/packages/date/test/format.ts
+++ b/packages/date/test/format.ts
@@ -8,7 +8,7 @@ import {
     HOUR,
     MINUTE,
     SECOND,
-} from "../src";
+} from "../src/index.js"
 
 group("date", {
     formatters: () => {
diff --git a/packages/date/test/i18n.ts b/packages/date/test/i18n.ts
index 2d4cdbf9a0..76c79a59b2 100644
--- a/packages/date/test/i18n.ts
+++ b/packages/date/test/i18n.ts
@@ -11,7 +11,7 @@ import {
     units,
     unitsLessThan,
     withLocale,
-} from "../src";
+} from "../src/index.js"
 
 interface I18NTestSpec {
     year1: string;
diff --git a/packages/date/test/iterators.ts b/packages/date/test/iterators.ts
index caaa96d691..d748bf0db9 100644
--- a/packages/date/test/iterators.ts
+++ b/packages/date/test/iterators.ts
@@ -9,7 +9,7 @@ import {
     months,
     YEAR,
     years,
-} from "../src";
+} from "../src/index.js"
 
 group("iterators", {
     hours: () => {
diff --git a/packages/date/test/relative.ts b/packages/date/test/relative.ts
index cf668bacb9..efac48db9e 100644
--- a/packages/date/test/relative.ts
+++ b/packages/date/test/relative.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { DateTime, dateTime, parseRelative } from "../src";
+import { DateTime, dateTime, parseRelative } from "../src/index.js"
 
 const checkDate = (offset: string, base: DateTime, expected: number) => {
     const d = parseRelative(offset, base);
diff --git a/packages/dcons/test/index.ts b/packages/dcons/test/index.ts
index c0f043fcc8..35f745d2b0 100644
--- a/packages/dcons/test/index.ts
+++ b/packages/dcons/test/index.ts
@@ -3,7 +3,7 @@ import { XsAdd } from "@thi.ng/random";
 import { group } from "@thi.ng/testament";
 import { range } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { DCons, defDCons } from "../src";
+import { DCons, defDCons } from "../src/index.js"
 
 let a: DCons<any>, src: number[];
 
diff --git a/packages/dcons/test/sol.ts b/packages/dcons/test/sol.ts
index 6c9f723145..09dff47417 100644
--- a/packages/dcons/test/sol.ts
+++ b/packages/dcons/test/sol.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defMTF, defTranspose } from "../src";
+import { defMTF, defTranspose } from "../src/index.js"
 
 group("dcons (self-organizing)", {
     "mtf (n=5)": () => {
diff --git a/packages/defmulti/test/index.ts b/packages/defmulti/test/index.ts
index e861a3523a..343b047cdd 100644
--- a/packages/defmulti/test/index.ts
+++ b/packages/defmulti/test/index.ts
@@ -7,7 +7,7 @@ import {
     defmultiN,
     implementations,
     setLogger,
-} from "../src";
+} from "../src/index.js"
 
 group("defmulti", {
     flatten: () => {
diff --git a/packages/dgraph-dot/test/index.ts b/packages/dgraph-dot/test/index.ts
index 5dcd823f54..df82ff05a0 100644
--- a/packages/dgraph-dot/test/index.ts
+++ b/packages/dgraph-dot/test/index.ts
@@ -1,7 +1,7 @@
 import { defDGraph } from "@thi.ng/dgraph";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { toDot } from "../src";
+import { toDot } from "../src/index.js"
 
 group("dgraph-dot", {
     basic: () => {
diff --git a/packages/dgraph/test/index.ts b/packages/dgraph/test/index.ts
index 6d11dfcda2..50047477f4 100644
--- a/packages/dgraph/test/index.ts
+++ b/packages/dgraph/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { DGraph } from "../src";
+import { DGraph } from "../src/index.js"
 
 let g: DGraph<any>;
 
diff --git a/packages/diff/test/array.ts b/packages/diff/test/array.ts
index 16e3eaf781..d66ff99ded 100644
--- a/packages/diff/test/array.ts
+++ b/packages/diff/test/array.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { ArrayDiff, diffArray } from "../src";
+import { ArrayDiff, diffArray } from "../src/index.js"
 
 const state = <ArrayDiff<number>>{
     distance: 0,
diff --git a/packages/distance/test/index.ts b/packages/distance/test/index.ts
index fa63c6aef9..70e795db9d 100644
--- a/packages/distance/test/index.ts
+++ b/packages/distance/test/index.ts
@@ -10,7 +10,7 @@ import {
     EUCLEDIAN3,
     knearestN,
     nearestN,
-} from "../src";
+} from "../src/index.js"
 
 group("distance", {
     eucledian1: () => {
diff --git a/packages/dl-asset/test/index.ts b/packages/dl-asset/test/index.ts
index aaa7ca7a94..8c07778058 100644
--- a/packages/dl-asset/test/index.ts
+++ b/packages/dl-asset/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("download", {});
diff --git a/packages/dlogic/test/index.ts b/packages/dlogic/test/index.ts
index eac6ddfbd4..6ecba5034a 100644
--- a/packages/dlogic/test/index.ts
+++ b/packages/dlogic/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as dl from "../src";
+// import * as dl from "../src/index.js"
 
 group("dlogic", {});
diff --git a/packages/dot/test/example.ts b/packages/dot/test/example.ts
index e35cee079c..ab3ec215e4 100644
--- a/packages/dot/test/example.ts
+++ b/packages/dot/test/example.ts
@@ -1,5 +1,5 @@
 import * as fs from "fs";
-import * as dot from "../src";
+import * as dot from "../src/index.js"
 
 // node type style presets
 const terminal: Partial<dot.Node> = {
diff --git a/packages/dot/test/index.ts b/packages/dot/test/index.ts
index c00a20d929..82dacd98e7 100644
--- a/packages/dot/test/index.ts
+++ b/packages/dot/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as dot from "../src";
+// import * as dot from "../src/index.js"
 
 group("dot", {});
diff --git a/packages/dsp-io-wav/test/index.ts b/packages/dsp-io-wav/test/index.ts
index 4f91da1ad2..741a5ae81f 100644
--- a/packages/dsp-io-wav/test/index.ts
+++ b/packages/dsp-io-wav/test/index.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { wavByteArray } from "../src";
+import { wavByteArray } from "../src/index.js"
 
 group("dsp-io-wav", {
     "mono 48kHz/16 bits": () => {
diff --git a/packages/dsp/test/fft.ts b/packages/dsp/test/fft.ts
index e4c48d41b2..2e0c9e0479 100644
--- a/packages/dsp/test/fft.ts
+++ b/packages/dsp/test/fft.ts
@@ -19,7 +19,7 @@ import {
     spectrumPow,
     window,
     windowRect,
-} from "../src";
+} from "../src/index.js"
 
 const deltaEq = (a: NumericArray, b: NumericArray, eps = 1e-3) => {
     if (a.length != b.length) return false;
diff --git a/packages/dual-algebra/test/index.ts b/packages/dual-algebra/test/index.ts
index d195b64383..cb63d30774 100644
--- a/packages/dual-algebra/test/index.ts
+++ b/packages/dual-algebra/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("dual-algebra", {});
diff --git a/packages/dynvar/test/index.ts b/packages/dynvar/test/index.ts
index 78189aac7b..b4b5469b34 100644
--- a/packages/dynvar/test/index.ts
+++ b/packages/dynvar/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { dynvar } from "../src";
+import { dynvar } from "../src/index.js"
 
 group("dynvar", {
     basic: () => {
diff --git a/packages/ecs/test/component.ts b/packages/ecs/test/component.ts
index 8e9fe427dc..2bc80ebc16 100644
--- a/packages/ecs/test/component.ts
+++ b/packages/ecs/test/component.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ECS, MemMappedComponent } from "../src";
+import { ECS, MemMappedComponent } from "../src/index.js"
 
 let ecs: ECS<any>;
 
diff --git a/packages/ecs/test/group.ts b/packages/ecs/test/group.ts
index e511ea784f..48f243439c 100644
--- a/packages/ecs/test/group.ts
+++ b/packages/ecs/test/group.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ECS, Group } from "../src";
+import { ECS, Group } from "../src/index.js"
 
 const collect = (g: Group<any, any>) => {
     let res: any[] = [];
diff --git a/packages/egf/test/escape.ts b/packages/egf/test/escape.ts
index b9ce4e2ff1..8a8da72f6a 100644
--- a/packages/egf/test/escape.ts
+++ b/packages/egf/test/escape.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { ParseContext, parseString } from "../src";
+import { ParseContext, parseString } from "../src/index.js"
 
 const $ctx: Partial<ParseContext> = { opts: { prefixes: true } };
 
diff --git a/packages/egf/test/prefix.ts b/packages/egf/test/prefix.ts
index 5ba760933e..1c0eec1d83 100644
--- a/packages/egf/test/prefix.ts
+++ b/packages/egf/test/prefix.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
 import { group } from "@thi.ng/testament";
-import { ParseContext, parseString, qualifiedID } from "../src";
+import { ParseContext, parseString, qualifiedID } from "../src/index.js"
 
 const $ctx: Partial<ParseContext> = { opts: { prefixes: true } };
 
diff --git a/packages/egf/test/ref.ts b/packages/egf/test/ref.ts
index b9ddf99891..ec099dd923 100644
--- a/packages/egf/test/ref.ts
+++ b/packages/egf/test/ref.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { parseString } from "../src";
+import { parseString } from "../src/index.js"
 
 const $ref = (id: string) => ({ $ref: id });
 
diff --git a/packages/egf/test/serialize.ts b/packages/egf/test/serialize.ts
index 87c93c4017..266393aa50 100644
--- a/packages/egf/test/serialize.ts
+++ b/packages/egf/test/serialize.ts
@@ -2,7 +2,7 @@ import { rdf, schema } from "@thi.ng/prefixes";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
 import { writeFileSync } from "fs";
-import { toEGF } from "../src";
+import { toEGF } from "../src/index.js"
 
 group("serialize", {
     basics: () => {
diff --git a/packages/equiv/test/index.ts b/packages/equiv/test/index.ts
index 36a5c809e6..b00934bbe6 100644
--- a/packages/equiv/test/index.ts
+++ b/packages/equiv/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { equiv } from "../src";
+import { equiv } from "../src/index.js"
 
 group("equiv", {
     null: () => {
diff --git a/packages/errors/test/index.ts b/packages/errors/test/index.ts
index 91030fc5ff..b4c1196df9 100644
--- a/packages/errors/test/index.ts
+++ b/packages/errors/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as errors from "../src";
+// import * as errors from "../src/index.js"
 
 group("errors", {});
diff --git a/packages/expose/test/index.ts b/packages/expose/test/index.ts
index b310ffc915..c642a69446 100644
--- a/packages/expose/test/index.ts
+++ b/packages/expose/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("expose", {
 
diff --git a/packages/fsm/test/index.ts b/packages/fsm/test/index.ts
index 9546c058e5..0b51838dea 100644
--- a/packages/fsm/test/index.ts
+++ b/packages/fsm/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as f from "../src";
+// import * as f from "../src/index.js"
 
 group("fsm", {});
diff --git a/packages/fuzzy-viz/test/index.ts b/packages/fuzzy-viz/test/index.ts
index c8362ceada..1f4f8b6898 100644
--- a/packages/fuzzy-viz/test/index.ts
+++ b/packages/fuzzy-viz/test/index.ts
@@ -2,7 +2,7 @@ import { centroidStrategy, gaussian } from "@thi.ng/fuzzy";
 import { eqDelta } from "@thi.ng/math";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fuzzySetToAscii, instrumentStrategy } from "../src";
+import { fuzzySetToAscii, instrumentStrategy } from "../src/index.js"
 
 group("fuzzy-viz", {
     "strategy (ascii)": () => {
diff --git a/packages/fuzzy/test/defuzz.ts b/packages/fuzzy/test/defuzz.ts
index b1e85c267a..14af3bdc97 100644
--- a/packages/fuzzy/test/defuzz.ts
+++ b/packages/fuzzy/test/defuzz.ts
@@ -15,7 +15,7 @@ import {
     ramp,
     triangle,
     variable,
-} from "../src";
+} from "../src/index.js"
 
 group("defuzz", {
     strategies: () => {
diff --git a/packages/fuzzy/test/lvar.ts b/packages/fuzzy/test/lvar.ts
index 5305d433c8..1683f653c5 100644
--- a/packages/fuzzy/test/lvar.ts
+++ b/packages/fuzzy/test/lvar.ts
@@ -9,7 +9,7 @@ import {
     sigmoid,
     trapezoid,
     variable,
-} from "../src";
+} from "../src/index.js"
 
 const roundVals = (obj: IObjectOf<number>) => {
     for (let k in obj) obj[k] = roundTo(obj[k], 1e-3);
diff --git a/packages/geom-accel/test/index.ts b/packages/geom-accel/test/index.ts
index ab1b147a0f..8aca8f5162 100644
--- a/packages/geom-accel/test/index.ts
+++ b/packages/geom-accel/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as ga from "../src";
+// import * as ga from "../src/index.js"
 
 group("geom-accel", {});
diff --git a/packages/geom-accel/test/quadtree.ts b/packages/geom-accel/test/quadtree.ts
index 7148778209..8e844fb387 100644
--- a/packages/geom-accel/test/quadtree.ts
+++ b/packages/geom-accel/test/quadtree.ts
@@ -2,7 +2,7 @@ import { group } from "@thi.ng/testament";
 import { mapIndexed } from "@thi.ng/transducers";
 import type { ReadonlyVec } from "@thi.ng/vectors";
 import * as assert from "assert";
-import { NdQuadtreeMap } from "../src";
+import { NdQuadtreeMap } from "../src/index.js"
 
 const pts = new Set<ReadonlyVec>([
     [10, 20, 30],
diff --git a/packages/geom-api/test/index.ts b/packages/geom-api/test/index.ts
index eeaf759fa5..0865e786fd 100644
--- a/packages/geom-api/test/index.ts
+++ b/packages/geom-api/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as ga from "../src";
+// import * as ga from "../src/index.js"
 
 group("geom-api", {});
diff --git a/packages/geom-arc/test/index.ts b/packages/geom-arc/test/index.ts
index 30f9eda60b..092b0d9871 100644
--- a/packages/geom-arc/test/index.ts
+++ b/packages/geom-arc/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as ga from "../src";
+// import * as ga from "../src/index.js"
 
 group("geom-arc", {});
diff --git a/packages/geom-clip-line/test/index.ts b/packages/geom-clip-line/test/index.ts
index 1e50bb35bc..a589cb5ae5 100644
--- a/packages/geom-clip-line/test/index.ts
+++ b/packages/geom-clip-line/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("geom-clip-line", {});
diff --git a/packages/geom-clip-poly/test/index.ts b/packages/geom-clip-poly/test/index.ts
index 27c2928010..2fe7ad1300 100644
--- a/packages/geom-clip-poly/test/index.ts
+++ b/packages/geom-clip-poly/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gc from "../src";
+// import * as gc from "../src/index.js"
 
 group("geom-clip-poly", {});
diff --git a/packages/geom-closest-point/test/index.ts b/packages/geom-closest-point/test/index.ts
index d7dc18f97e..9a2881c472 100644
--- a/packages/geom-closest-point/test/index.ts
+++ b/packages/geom-closest-point/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gcp from "../src";
+// import * as gcp from "../src/index.js"
 
 group("geom-closest-point", {});
diff --git a/packages/geom-fuzz/test/index.ts b/packages/geom-fuzz/test/index.ts
index 85c09523b7..57dc004a14 100644
--- a/packages/geom-fuzz/test/index.ts
+++ b/packages/geom-fuzz/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("geom-fuzz", {});
diff --git a/packages/geom-hull/test/index.ts b/packages/geom-hull/test/index.ts
index a20f0d6327..1e7dc9652f 100644
--- a/packages/geom-hull/test/index.ts
+++ b/packages/geom-hull/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gh from "../src";
+// import * as gh from "../src/index.js"
 
 group("geom-hull", {});
diff --git a/packages/geom-io-obj/test/index.ts b/packages/geom-io-obj/test/index.ts
index 67ab0aa9c3..6fef7d7604 100644
--- a/packages/geom-io-obj/test/index.ts
+++ b/packages/geom-io-obj/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { parseOBJ } from "../src";
+import { parseOBJ } from "../src/index.js"
 
 const src = `
 # test cube
diff --git a/packages/geom-isec/test/point-segment.ts b/packages/geom-isec/test/point-segment.ts
index 2ecf7e7127..8bb368420f 100644
--- a/packages/geom-isec/test/point-segment.ts
+++ b/packages/geom-isec/test/point-segment.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { pointInSegment } from "../src";
+import { pointInSegment } from "../src/index.js"
 
 group("pointInSegment", {
     "2d": () => {
diff --git a/packages/geom-isec/test/polyline.ts b/packages/geom-isec/test/polyline.ts
index 69708ab637..c954028b7c 100644
--- a/packages/geom-isec/test/polyline.ts
+++ b/packages/geom-isec/test/polyline.ts
@@ -1,7 +1,7 @@
 import { IntersectionType } from "@thi.ng/geom-api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { intersectLinePolylineAll, intersectRayPolylineAll } from "../src";
+import { intersectLinePolylineAll, intersectRayPolylineAll } from "../src/index.js"
 
 const pts = [
     [0, 0],
diff --git a/packages/geom-isec/test/ray.ts b/packages/geom-isec/test/ray.ts
index 438fa58f63..c824e82346 100644
--- a/packages/geom-isec/test/ray.ts
+++ b/packages/geom-isec/test/ray.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { eqDelta, maddN3, mulN3, normalize, Vec } from "@thi.ng/vectors";
 import * as assert from "assert";
-import { intersectRayAABB } from "../src";
+import { intersectRayAABB } from "../src/index.js"
 
 group("ray intersection", {
     "rayBox inside": () => {
diff --git a/packages/geom-isoline/test/index.ts b/packages/geom-isoline/test/index.ts
index 074940b538..abb92de22b 100644
--- a/packages/geom-isoline/test/index.ts
+++ b/packages/geom-isoline/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gi from "../src";
+// import * as gi from "../src/index.js"
 
 group("geom-isoline", {});
diff --git a/packages/geom-poly-utils/test/index.ts b/packages/geom-poly-utils/test/index.ts
index dd1bb34394..bfa57a7a5e 100644
--- a/packages/geom-poly-utils/test/index.ts
+++ b/packages/geom-poly-utils/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gpu from "../src";
+// import * as gpu from "../src/index.js"
 
 group("geom-poly-utils", {});
diff --git a/packages/geom-resample/test/index.ts b/packages/geom-resample/test/index.ts
index ec5872d496..b284b5ffdb 100644
--- a/packages/geom-resample/test/index.ts
+++ b/packages/geom-resample/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gs from "../src";
+// import * as gs from "../src/index.js"
 
 group("geom-resample", {});
diff --git a/packages/geom-splines/test/index.ts b/packages/geom-splines/test/index.ts
index afe6ccdc55..48185c326d 100644
--- a/packages/geom-splines/test/index.ts
+++ b/packages/geom-splines/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gs from "../src";
+// import * as gs from "../src/index.js"
 
 group("geom-splines", {});
diff --git a/packages/geom-subdiv-curve/test/index.ts b/packages/geom-subdiv-curve/test/index.ts
index 80e8c70542..7583d81b9c 100644
--- a/packages/geom-subdiv-curve/test/index.ts
+++ b/packages/geom-subdiv-curve/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gsc from "../src";
+// import * as gsc from "../src/index.js"
 
 group("geom-subdiv-curve", {});
diff --git a/packages/geom-tessellate/test/index.ts b/packages/geom-tessellate/test/index.ts
index 89c592884e..b7df429630 100644
--- a/packages/geom-tessellate/test/index.ts
+++ b/packages/geom-tessellate/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gt from "../src";
+// import * as gt from "../src/index.js"
 
 group("geom-tessellate", {});
diff --git a/packages/geom-voronoi/test/index.ts b/packages/geom-voronoi/test/index.ts
index a61d905e89..6ccbbb3e91 100644
--- a/packages/geom-voronoi/test/index.ts
+++ b/packages/geom-voronoi/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gv from "../src";
+// import * as gv from "../src/index.js"
 
 group("geom-voronoi", {});
diff --git a/packages/geom/test/index.ts b/packages/geom/test/index.ts
index 2b4a7c1874..da9a69187b 100644
--- a/packages/geom/test/index.ts
+++ b/packages/geom/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as g from "../src";
+// import * as g from "../src/index.js"
 
 group("geom", {});
diff --git a/packages/gp/test/ast.ts b/packages/gp/test/ast.ts
index b29ac441c3..67e1331e93 100644
--- a/packages/gp/test/ast.ts
+++ b/packages/gp/test/ast.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { XsAdd } from "@thi.ng/random";
 import * as assert from "assert";
-import { AST } from "../src";
+import { AST } from "../src/index.js"
 
 let ast: AST<string, number>;
 
diff --git a/packages/gp/test/mep.ts b/packages/gp/test/mep.ts
index 9286d733e1..8b7957849f 100644
--- a/packages/gp/test/mep.ts
+++ b/packages/gp/test/mep.ts
@@ -1,7 +1,7 @@
 import { XsAdd } from "@thi.ng/random";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { MEP } from "../src";
+import { MEP } from "../src/index.js"
 
 let ast: MEP<string, number>;
 
diff --git a/packages/grid-iterators/test/index.ts b/packages/grid-iterators/test/index.ts
index adb8a2f2af..7ec7133c20 100644
--- a/packages/grid-iterators/test/index.ts
+++ b/packages/grid-iterators/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gi from "../src";
+// import * as gi from "../src/index.js"
 
 group("grid-iterators", {});
diff --git a/packages/hdiff/test/index.ts b/packages/hdiff/test/index.ts
index 9852ce5b64..6821a46df2 100644
--- a/packages/hdiff/test/index.ts
+++ b/packages/hdiff/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("hdiff", {});
diff --git a/packages/hdom-canvas/test/index.ts b/packages/hdom-canvas/test/index.ts
index ca3eae90a9..a339928695 100644
--- a/packages/hdom-canvas/test/index.ts
+++ b/packages/hdom-canvas/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as hc from "../src";
+// import * as hc from "../src/index.js"
 
 group("hiccup-canvas", {});
diff --git a/packages/hdom-components/test/index.ts b/packages/hdom-components/test/index.ts
index f14eb4bc3a..6a8cd7c4a4 100644
--- a/packages/hdom-components/test/index.ts
+++ b/packages/hdom-components/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as hc from "../src";
+// import * as hc from "../src/index.js"
 
 group("hdom-components", {});
diff --git a/packages/hdom-mock/test/index.ts b/packages/hdom-mock/test/index.ts
index 57c6cb784e..fe729a5d54 100644
--- a/packages/hdom-mock/test/index.ts
+++ b/packages/hdom-mock/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { HDOMNode, MockHDOM } from "../src";
+import { HDOMNode, MockHDOM } from "../src/index.js"
 
 group("hdom-mock", {
     node: () => {
diff --git a/packages/hdom/test/index.ts b/packages/hdom/test/index.ts
index 7cbf2fa826..c189c4d8b4 100644
--- a/packages/hdom/test/index.ts
+++ b/packages/hdom/test/index.ts
@@ -3,7 +3,7 @@ import { derefContext } from "@thi.ng/hiccup";
 import { map, range } from "@thi.ng/iterators";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { normalizeTree } from "../src";
+import { normalizeTree } from "../src/index.js"
 
 const _check = (a: any, b: any, ctx: any = null) =>
     assert.deepStrictEqual(
diff --git a/packages/heaps/test/dheap.ts b/packages/heaps/test/dheap.ts
index 8aa92e50e5..d54e3f5600 100644
--- a/packages/heaps/test/dheap.ts
+++ b/packages/heaps/test/dheap.ts
@@ -1,7 +1,7 @@
 import { compare } from "@thi.ng/compare";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { DHeap } from "../src";
+import { DHeap } from "../src/index.js"
 
 const rcmp: (a: number, b: number) => number = (a, b) => b - a;
 
diff --git a/packages/heaps/test/heap.ts b/packages/heaps/test/heap.ts
index 00cc3a5df3..09d655e8c1 100644
--- a/packages/heaps/test/heap.ts
+++ b/packages/heaps/test/heap.ts
@@ -1,7 +1,7 @@
 import { compare } from "@thi.ng/compare";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Heap } from "../src";
+import { Heap } from "../src/index.js"
 
 const rcmp: (a: number, b: number) => number = (a, b) => b - a;
 
diff --git a/packages/hex/test/index.ts b/packages/hex/test/index.ts
index 846df7331c..e9c9184015 100644
--- a/packages/hex/test/index.ts
+++ b/packages/hex/test/index.ts
@@ -18,7 +18,7 @@ import {
     U64BE,
     U64HL,
     U64LE,
-} from "../src";
+} from "../src/index.js"
 
 const BUF = [1, 2, 3, 4, 0x10, 0x20, 0x30, 0x40];
 
diff --git a/packages/hiccup-canvas/test/index.ts b/packages/hiccup-canvas/test/index.ts
index 5e61b557b6..e01636ed8f 100644
--- a/packages/hiccup-canvas/test/index.ts
+++ b/packages/hiccup-canvas/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("hiccup-canvas", {});
diff --git a/packages/hiccup-carbon-icons/test/index.ts b/packages/hiccup-carbon-icons/test/index.ts
index 260679a9ba..3fe6b52f74 100644
--- a/packages/hiccup-carbon-icons/test/index.ts
+++ b/packages/hiccup-carbon-icons/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("hiccup-carbon-icons", {});
diff --git a/packages/hiccup-css/test/index.ts b/packages/hiccup-css/test/index.ts
index 87ec79428c..5bac2411ae 100644
--- a/packages/hiccup-css/test/index.ts
+++ b/packages/hiccup-css/test/index.ts
@@ -7,7 +7,7 @@ import {
     at_media,
     css,
     PRETTY,
-} from "../src";
+} from "../src/index.js"
 
 const rules = {
     a: { color: "red" },
diff --git a/packages/hiccup-html/test/index.ts b/packages/hiccup-html/test/index.ts
index 6e2e1c6eba..e4c165796d 100644
--- a/packages/hiccup-html/test/index.ts
+++ b/packages/hiccup-html/test/index.ts
@@ -1,7 +1,7 @@
 import type { IDeref } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { AttribVal, defElement } from "../src";
+import { AttribVal, defElement } from "../src/index.js"
 
 group("hiccup-html", {
     defElement: () => {
diff --git a/packages/hiccup-markdown/test/parse.ts b/packages/hiccup-markdown/test/parse.ts
index 0594d828ea..4369e67c48 100644
--- a/packages/hiccup-markdown/test/parse.ts
+++ b/packages/hiccup-markdown/test/parse.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { iterator } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { parse } from "../src";
+import { parse } from "../src/index.js"
 
 const check = (src: string, expected: any[]) =>
     assert.deepStrictEqual([...iterator(parse(), src)], expected);
diff --git a/packages/hiccup-markdown/test/serialize.ts b/packages/hiccup-markdown/test/serialize.ts
index 7bcac04a68..b883878d6e 100644
--- a/packages/hiccup-markdown/test/serialize.ts
+++ b/packages/hiccup-markdown/test/serialize.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { serialize } from "../src";
+import { serialize } from "../src/index.js"
 
 group("hiccup-markdown", {
     serialize: () => {
diff --git a/packages/hiccup-svg/test/index.ts b/packages/hiccup-svg/test/index.ts
index 97be7ebed9..f48d200e2c 100644
--- a/packages/hiccup-svg/test/index.ts
+++ b/packages/hiccup-svg/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as svg from "../src";
+// import * as svg from "../src/index.js"
 
 group("hiccup-svg", {});
diff --git a/packages/hiccup/test/index.ts b/packages/hiccup/test/index.ts
index 01b4e65fc1..5ccb5adf0f 100644
--- a/packages/hiccup/test/index.ts
+++ b/packages/hiccup/test/index.ts
@@ -2,7 +2,7 @@ import { Atom } from "@thi.ng/atom";
 import { foaf } from "@thi.ng/prefixes";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { serialize } from "../src";
+import { serialize } from "../src/index.js"
 
 const _check = (a: any, b: any) => assert.strictEqual(serialize(a), b);
 
diff --git a/packages/idgen/test/index.ts b/packages/idgen/test/index.ts
index 8e01fd0585..f051a5b60f 100644
--- a/packages/idgen/test/index.ts
+++ b/packages/idgen/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { EVENT_ADDED, EVENT_REMOVED, IDGen } from "../src";
+import { EVENT_ADDED, EVENT_REMOVED, IDGen } from "../src/index.js"
 
 group("idgen", {
     "re-use (versioned)": () => {
diff --git a/packages/iges/test/index.ts b/packages/iges/test/index.ts
index 03db248431..498b1f7234 100644
--- a/packages/iges/test/index.ts
+++ b/packages/iges/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import * as iges from "../src";
+import * as iges from "../src/index.js"
 
 group("iges", {
     basic: () => {
diff --git a/packages/imgui/test/index.ts b/packages/imgui/test/index.ts
index 062f8fc47b..00da991930 100644
--- a/packages/imgui/test/index.ts
+++ b/packages/imgui/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as i from "../src";
+// import * as i from "../src/index.js"
 
 group("imgui", {});
diff --git a/packages/interceptors/test/index.ts b/packages/interceptors/test/index.ts
index 56b95d2e85..8e26799e82 100644
--- a/packages/interceptors/test/index.ts
+++ b/packages/interceptors/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as interceptors from "../src";
+// import * as interceptors from "../src/index.js"
 
 group("interceptors", {});
diff --git a/packages/intervals/test/index.ts b/packages/intervals/test/index.ts
index 0ce85298ac..b2d589379a 100644
--- a/packages/intervals/test/index.ts
+++ b/packages/intervals/test/index.ts
@@ -9,7 +9,7 @@ import {
     interval as i,
     samples,
     union,
-} from "../src";
+} from "../src/index.js"
 
 group("intervals", {
     classify: () => {
diff --git a/packages/iterators/test/index.ts b/packages/iterators/test/index.ts
index fa1ace9022..d502c5df3b 100644
--- a/packages/iterators/test/index.ts
+++ b/packages/iterators/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import * as ti from "../src";
+import * as ti from "../src/index.js"
 
 group("iterators", {
     butLast: () => {
diff --git a/packages/k-means/test/index.ts b/packages/k-means/test/index.ts
index 616adb386e..4f39472652 100644
--- a/packages/k-means/test/index.ts
+++ b/packages/k-means/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("k-means", {});
diff --git a/packages/ksuid/test/index.ts b/packages/ksuid/test/index.ts
index f47fe11b6b..8bd6ad0ed8 100644
--- a/packages/ksuid/test/index.ts
+++ b/packages/ksuid/test/index.ts
@@ -1,7 +1,7 @@
 import { XsAdd } from "@thi.ng/random";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defKSUID32, defKSUID64, defULID, IKSUID } from "../src";
+import { defKSUID32, defKSUID64, defULID, IKSUID } from "../src/index.js"
 
 const check = (id: IKSUID, eps: number, buf: Uint8Array) => {
     const t = Date.now();
diff --git a/packages/layout/test/index.ts b/packages/layout/test/index.ts
index 10e91d221d..e6e1884e70 100644
--- a/packages/layout/test/index.ts
+++ b/packages/layout/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("layout", {});
diff --git a/packages/leb128/test/index.ts b/packages/leb128/test/index.ts
index 8237845ef3..0c0262f2a4 100644
--- a/packages/leb128/test/index.ts
+++ b/packages/leb128/test/index.ts
@@ -6,7 +6,7 @@ import {
     decodeULEB128,
     encodeSLEB128,
     encodeULEB128,
-} from "../src";
+} from "../src/index.js"
 
 if (hasWASM()) {
     group("leb128", {
diff --git a/packages/logger/test/index.ts b/packages/logger/test/index.ts
new file mode 100644
index 0000000000..470cbb5109
--- /dev/null
+++ b/packages/logger/test/index.ts
@@ -0,0 +1,7 @@
+import { group } from "@thi.ng/testament";
+// import * as assert from "assert";
+// import { } from "../src/index.js"
+
+group("logger", {
+
+});
diff --git a/packages/lowdisc/test/index.ts b/packages/lowdisc/test/index.ts
index dbacf598f3..a2aee91fcb 100644
--- a/packages/lowdisc/test/index.ts
+++ b/packages/lowdisc/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("lowdisc", {});
diff --git a/packages/lsys/test/tree.ts b/packages/lsys/test/tree.ts
index d657ed162a..df7e0ca6c5 100644
--- a/packages/lsys/test/tree.ts
+++ b/packages/lsys/test/tree.ts
@@ -2,7 +2,7 @@ import * as g from "@thi.ng/geom";
 import { PI } from "@thi.ng/math";
 import { XsAdd } from "@thi.ng/random";
 import * as fs from "fs";
-import * as lsys from "../src";
+import * as lsys from "../src/index.js"
 
 const impl = lsys.TURTLE_IMPL_2D;
 
diff --git a/packages/malloc/test/index.ts b/packages/malloc/test/index.ts
index 87036ca088..95b65a41e9 100644
--- a/packages/malloc/test/index.ts
+++ b/packages/malloc/test/index.ts
@@ -2,7 +2,7 @@ import type { TypedArray } from "@thi.ng/api";
 import { align } from "@thi.ng/binary";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { MemPool } from "../src";
+import { MemPool } from "../src/index.js"
 
 const POOL_OVERHEAD = 7 * 4;
 const BLOCK_OVERHEAD = 2 * 4;
diff --git a/packages/malloc/test/native.ts b/packages/malloc/test/native.ts
index 2b44b6f88a..ab79144675 100644
--- a/packages/malloc/test/native.ts
+++ b/packages/malloc/test/native.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { NativePool } from "../src";
+import { NativePool } from "../src/index.js"
 
 const pool = new NativePool();
 
diff --git a/packages/markdown-table/test/index.ts b/packages/markdown-table/test/index.ts
index a8d4b78cd6..5f97436d67 100644
--- a/packages/markdown-table/test/index.ts
+++ b/packages/markdown-table/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { table, tableKeys } from "../src";
+import { table, tableKeys } from "../src/index.js"
 
 const result1 = `| **ID** | **Actor** | **Comment** |
 |-------:|:---------:|:------------|
diff --git a/packages/math/test/index.ts b/packages/math/test/index.ts
index 248903d697..8873e49493 100644
--- a/packages/math/test/index.ts
+++ b/packages/math/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fmod, mod, remainder } from "../src";
+import { fmod, mod, remainder } from "../src/index.js"
 
 group("math", {
     fmod: () => {
diff --git a/packages/matrices/test/index.ts b/packages/matrices/test/index.ts
index 823685d5c7..7998de7e0d 100644
--- a/packages/matrices/test/index.ts
+++ b/packages/matrices/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { range } from "@thi.ng/transducers";
 import * as assert from "assert";
-import * as m from "../src";
+import * as m from "../src/index.js"
 
 group("matrices", {
     "identity (fixed)": () => {
diff --git a/packages/memoize/test/index.ts b/packages/memoize/test/index.ts
index 1848126ba0..2c25a188d7 100644
--- a/packages/memoize/test/index.ts
+++ b/packages/memoize/test/index.ts
@@ -2,7 +2,7 @@ import { EquivMap } from "@thi.ng/associative";
 import { LRUCache } from "@thi.ng/cache";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { memoize1 } from "../src";
+import { memoize1 } from "../src/index.js"
 
 group("memoize", {
     memoize1: () => {
diff --git a/packages/mime/test/index.ts b/packages/mime/test/index.ts
index ac20ac6c5c..6b394cb85b 100644
--- a/packages/mime/test/index.ts
+++ b/packages/mime/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("mime", {});
diff --git a/packages/morton/test/index.ts b/packages/morton/test/index.ts
index 6a1e7ac238..643610b4c2 100644
--- a/packages/morton/test/index.ts
+++ b/packages/morton/test/index.ts
@@ -5,7 +5,7 @@ import {
     mortonToTree,
     treeToCartesian,
     treeToMorton,
-} from "../src";
+} from "../src/index.js"
 
 group(
     "morton",
diff --git a/packages/morton/test/zcurve.ts b/packages/morton/test/zcurve.ts
index 9cf2307f0a..a7a7909845 100644
--- a/packages/morton/test/zcurve.ts
+++ b/packages/morton/test/zcurve.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { ZCurve } from "../src";
+import { ZCurve } from "../src/index.js"
 
 group("ZCurve", {
     ctor: () => {
diff --git a/packages/oquery/test/index.ts b/packages/oquery/test/index.ts
index 053204758f..6762e018be 100644
--- a/packages/oquery/test/index.ts
+++ b/packages/oquery/test/index.ts
@@ -1,7 +1,7 @@
 import { isNumber } from "@thi.ng/checks";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defKeyQuery, defQuery, OTerm, QueryType, SPInputTerm } from "../src";
+import { defKeyQuery, defQuery, OTerm, QueryType, SPInputTerm } from "../src/index.js"
 
 const DB = {
     alice: {
diff --git a/packages/parse/test/binary.ts b/packages/parse/test/binary.ts
index 6253ed9839..b2d4dbd433 100644
--- a/packages/parse/test/binary.ts
+++ b/packages/parse/test/binary.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defContext, lit, oneOrMore, Parser, range, seq, string } from "../src";
+import { defContext, lit, oneOrMore, Parser, range, seq, string } from "../src/index.js"
 
 const check = (
     parser: Parser<number>,
diff --git a/packages/parse/test/float.ts b/packages/parse/test/float.ts
index eee6b318b5..05e272878f 100644
--- a/packages/parse/test/float.ts
+++ b/packages/parse/test/float.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defContext, FLOAT } from "../src";
+import { defContext, FLOAT } from "../src/index.js"
 
 group("parse", {
     float: () => {
diff --git a/packages/parse/test/grammar.ts b/packages/parse/test/grammar.ts
index c9e09c749b..21e84cc0f2 100644
--- a/packages/parse/test/grammar.ts
+++ b/packages/parse/test/grammar.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defContext, defGrammar, Parser } from "../src";
+import { defContext, defGrammar, Parser } from "../src/index.js"
 
 const check = (
     parser: Parser<string>,
diff --git a/packages/parse/test/index.ts b/packages/parse/test/index.ts
index 89e705a614..a4a9c5ef85 100644
--- a/packages/parse/test/index.ts
+++ b/packages/parse/test/index.ts
@@ -8,7 +8,7 @@ import {
     seq,
     WS,
     zeroOrMore,
-} from "../src";
+} from "../src/index.js"
 
 const check = (
     parser: Parser<string>,
diff --git a/packages/parse/test/lookahead.ts b/packages/parse/test/lookahead.ts
index 511dd06c31..487df2354e 100644
--- a/packages/parse/test/lookahead.ts
+++ b/packages/parse/test/lookahead.ts
@@ -8,7 +8,7 @@ import {
     oneOf,
     string,
     stringD,
-} from "../src";
+} from "../src/index.js"
 
 group("lookahead", {
     "oneof (no capture)": () => {
diff --git a/packages/parse/test/rpn.ts b/packages/parse/test/rpn.ts
index 5b9385e21a..bf2ebcf809 100644
--- a/packages/parse/test/rpn.ts
+++ b/packages/parse/test/rpn.ts
@@ -1,7 +1,7 @@
 import type { Fn2 } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { alt, defContext, FLOAT, oneOf, WS0, xform, zeroOrMore } from "../src";
+import { alt, defContext, FLOAT, oneOf, WS0, xform, zeroOrMore } from "../src/index.js"
 
 group("parse", {
     "RPN calc": () => {
diff --git a/packages/parse/test/sexpr.ts b/packages/parse/test/sexpr.ts
index 177fe8e064..c4d31118a3 100644
--- a/packages/parse/test/sexpr.ts
+++ b/packages/parse/test/sexpr.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defContext, defGrammar, ParseScope } from "../src";
+import { defContext, defGrammar, ParseScope } from "../src/index.js"
 
 const grammar = `
 list: '('! <expr> ')'! ;
diff --git a/packages/parse/test/svg.ts b/packages/parse/test/svg.ts
index cc6899c2d2..0d24032505 100644
--- a/packages/parse/test/svg.ts
+++ b/packages/parse/test/svg.ts
@@ -12,7 +12,7 @@ import {
     WS0,
     xform,
     zeroOrMore,
-} from "../src";
+} from "../src/index.js"
 
 const check = (
     parser: Parser<string>,
diff --git a/packages/paths/test/index.ts b/packages/paths/test/index.ts
index a5e2987e0c..3095744edb 100644
--- a/packages/paths/test/index.ts
+++ b/packages/paths/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { exists, getIn, getInUnsafe, mutIn, setIn, setInUnsafe } from "../src";
+import { exists, getIn, getInUnsafe, mutIn, setIn, setInUnsafe } from "../src/index.js"
 
 group("paths", {
     getIn: () => {
diff --git a/packages/pixel-dither/test/index.ts b/packages/pixel-dither/test/index.ts
index bfb7229338..8016af135a 100644
--- a/packages/pixel-dither/test/index.ts
+++ b/packages/pixel-dither/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("pixel-dither", {
 
diff --git a/packages/pixel-io-netpbm/test/read.ts b/packages/pixel-io-netpbm/test/read.ts
index 9e7f1936a7..c71a7bc88b 100644
--- a/packages/pixel-io-netpbm/test/read.ts
+++ b/packages/pixel-io-netpbm/test/read.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { parseHeader, read } from "../src";
+import { parseHeader, read } from "../src/index.js"
 
 group("pixel-io-netpbm", {
     "parse header": () => {
diff --git a/packages/pixel/test/float.ts b/packages/pixel/test/float.ts
index dc4e0872a6..94e717a829 100644
--- a/packages/pixel/test/float.ts
+++ b/packages/pixel/test/float.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { FLOAT_GRAY, FLOAT_GRAY_ALPHA, FLOAT_RGB, FLOAT_RGBA } from "../src";
+import { FLOAT_GRAY, FLOAT_GRAY_ALPHA, FLOAT_RGB, FLOAT_RGBA } from "../src/index.js"
 
 group("float", {
     FLOAT_GRAY: () => {
diff --git a/packages/pixel/test/index.ts b/packages/pixel/test/index.ts
index 58f1c6e891..4571ec2cd7 100644
--- a/packages/pixel/test/index.ts
+++ b/packages/pixel/test/index.ts
@@ -13,7 +13,7 @@ import {
     PackedFormat,
     RGB565,
     RGB888,
-} from "../src";
+} from "../src/index.js"
 // import { equiv } from "@thi.ng/equiv";
 
 const testFromABGR = (fmt: PackedFormat, specs: number[]) => {
diff --git a/packages/pointfree/test/index.ts b/packages/pointfree/test/index.ts
index 3ed3dbd8db..f94d81f62b 100644
--- a/packages/pointfree/test/index.ts
+++ b/packages/pointfree/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import * as pf from "../src";
-import type { StackContext } from "../src";
+import * as pf from "../src/index.js"
+import type { StackContext } from "../src/index.js"
 
 const $ = pf.ctx;
 
diff --git a/packages/pointfree/test/loop.ts b/packages/pointfree/test/loop.ts
index 6f47ba47b9..5653d16f7b 100644
--- a/packages/pointfree/test/loop.ts
+++ b/packages/pointfree/test/loop.ts
@@ -15,7 +15,7 @@ import {
     StackFn,
     StackProgram,
     swap,
-} from "../src";
+} from "../src/index.js"
 
 /**
  * This higher order word defines a 2D loop construct, executing a user
diff --git a/packages/poisson/test/index.ts b/packages/poisson/test/index.ts
index 2fe8da8695..c06a217edb 100644
--- a/packages/poisson/test/index.ts
+++ b/packages/poisson/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as gp from "../src";
+// import * as gp from "../src/index.js"
 
 group("poisson", {});
diff --git a/packages/porter-duff/test/index.ts b/packages/porter-duff/test/index.ts
index 1da761a550..64c54f77cf 100644
--- a/packages/porter-duff/test/index.ts
+++ b/packages/porter-duff/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as pd from "../src";
+// import * as pd from "../src/index.js"
 
 group("porter-duff", {});
diff --git a/packages/prefixes/test/index.ts b/packages/prefixes/test/index.ts
index 66a24b195f..2bdfa13678 100644
--- a/packages/prefixes/test/index.ts
+++ b/packages/prefixes/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("prefixes", {});
diff --git a/packages/quad-edge/test/index.ts b/packages/quad-edge/test/index.ts
index 350a4a5797..9cc6a94409 100644
--- a/packages/quad-edge/test/index.ts
+++ b/packages/quad-edge/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as q from "../src";
+// import * as q from "../src/index.js"
 
 group("quad-edge", {});
diff --git a/packages/ramp/test/index.ts b/packages/ramp/test/index.ts
index 33ed369199..8bd5d19033 100644
--- a/packages/ramp/test/index.ts
+++ b/packages/ramp/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as r from "../src";
+// import * as r from "../src/index.js"
 
 group("ramp", {});
diff --git a/packages/random/test/index.ts b/packages/random/test/index.ts
index 6c64cb5e20..f0d7d106ef 100644
--- a/packages/random/test/index.ts
+++ b/packages/random/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as r from "../src";
+// import * as r from "../src/index.js"
 
 group("random", {});
diff --git a/packages/random/test/uuid.ts b/packages/random/test/uuid.ts
index e6236a36c2..6197def38d 100644
--- a/packages/random/test/uuid.ts
+++ b/packages/random/test/uuid.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { uuid, uuidv4Bytes, Xoshiro128 } from "../src";
+import { uuid, uuidv4Bytes, Xoshiro128 } from "../src/index.js"
 
 group("uuid", {
     "from seeded rnd": () => {
diff --git a/packages/range-coder/test/index.ts b/packages/range-coder/test/index.ts
index 67385b7516..0801b4dae8 100644
--- a/packages/range-coder/test/index.ts
+++ b/packages/range-coder/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { repeat, repeatedly } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { decodeBytes, encodeBytes } from "../src";
+import { decodeBytes, encodeBytes } from "../src/index.js"
 
 group("range-coder", {
     fixed: () => {
diff --git a/packages/rdom-canvas/test/index.ts b/packages/rdom-canvas/test/index.ts
index 0adf9bcb90..09f0a0a111 100644
--- a/packages/rdom-canvas/test/index.ts
+++ b/packages/rdom-canvas/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("rdom-canvas", {});
diff --git a/packages/rdom-components/test/index.ts b/packages/rdom-components/test/index.ts
index beb4641cbc..b00f65df0a 100644
--- a/packages/rdom-components/test/index.ts
+++ b/packages/rdom-components/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("rdom-components", {});
diff --git a/packages/rdom/test/index.ts b/packages/rdom/test/index.ts
index 979c47633d..78030bac2a 100644
--- a/packages/rdom/test/index.ts
+++ b/packages/rdom/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("rdom", {});
diff --git a/packages/resolve-map/test/index.ts b/packages/resolve-map/test/index.ts
index 401b7bb3ca..0e25e41fec 100644
--- a/packages/resolve-map/test/index.ts
+++ b/packages/resolve-map/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import * as tx from "@thi.ng/transducers";
 import * as assert from "assert";
-import { resolve, ResolveFn } from "../src";
+import { resolve, ResolveFn } from "../src/index.js"
 
 group("resolve-map", {
     simple: () => {
diff --git a/packages/rle-pack/test/index.ts b/packages/rle-pack/test/index.ts
index 2b6d653c09..ee9ff94031 100644
--- a/packages/rle-pack/test/index.ts
+++ b/packages/rle-pack/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { decode, encode } from "../src";
+import { decode, encode } from "../src/index.js"
 
 const src1k = new Uint8Array(1024);
 // prettier-ignore
diff --git a/packages/router/test/index.ts b/packages/router/test/index.ts
index cb89389277..241e67b377 100644
--- a/packages/router/test/index.ts
+++ b/packages/router/test/index.ts
@@ -1,4 +1,4 @@
 // import * as assert from "assert";
-// import {} from "../src";
+// import {} from "../src/index.js"
 
 // group("router", {});
diff --git a/packages/rstream-csp/test/index.ts b/packages/rstream-csp/test/index.ts
index d5d525f48e..e791cc924c 100644
--- a/packages/rstream-csp/test/index.ts
+++ b/packages/rstream-csp/test/index.ts
@@ -2,7 +2,7 @@ import * as csp from "@thi.ng/csp";
 import * as rs from "@thi.ng/rstream";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fromChannel } from "../src";
+import { fromChannel } from "../src/index.js"
 
 group("fromChannel", {
     "receives all values": ({ done }) => {
diff --git a/packages/rstream-dot/test/index.ts b/packages/rstream-dot/test/index.ts
index f66908c8a0..ccf34ddfb7 100644
--- a/packages/rstream-dot/test/index.ts
+++ b/packages/rstream-dot/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as rstream-dot from "../src";
+// import * as rstream-dot from "../src/index.js"
 
 group("rstream-dot", {});
diff --git a/packages/rstream-gestures/test/index.ts b/packages/rstream-gestures/test/index.ts
index adf5e893d0..d30790474d 100644
--- a/packages/rstream-gestures/test/index.ts
+++ b/packages/rstream-gestures/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as rstream-gestures from "../src";
+// import * as rstream-gestures from "../src/index.js"
 
 group("rstream-gestures", {});
diff --git a/packages/rstream-graph/test/index.ts b/packages/rstream-graph/test/index.ts
index e18d54f856..9f2b900701 100644
--- a/packages/rstream-graph/test/index.ts
+++ b/packages/rstream-graph/test/index.ts
@@ -3,7 +3,7 @@ import { fromIterable } from "@thi.ng/rstream";
 import { group } from "@thi.ng/testament";
 import { map } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { add, initGraph, mul, node1 } from "../src";
+import { add, initGraph, mul, node1 } from "../src/index.js"
 
 group("rstream-graph", {
     basic: ({ done }) => {
diff --git a/packages/rstream-log-file/test/index.ts b/packages/rstream-log-file/test/index.ts
index c340f232b5..a7637cd407 100644
--- a/packages/rstream-log-file/test/index.ts
+++ b/packages/rstream-log-file/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as rlf from "../src";
+// import * as rlf from "../src/index.js"
 
 group("rstream-log-file", {});
diff --git a/packages/rstream-log/test/index.ts b/packages/rstream-log/test/index.ts
index 690bd3d9bf..6fbc1a910a 100644
--- a/packages/rstream-log/test/index.ts
+++ b/packages/rstream-log/test/index.ts
@@ -2,7 +2,7 @@ import { LogLevel } from "@thi.ng/logger";
 import { ISubscriber, State } from "@thi.ng/rstream";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { formatString, Logger } from "../src";
+import { formatString, Logger } from "../src/index.js"
 
 const collect = (acc: string[]) => {
     return <ISubscriber<string>>{
diff --git a/packages/rstream-query/test/example.ts b/packages/rstream-query/test/example.ts
index 8b6e413fc5..ab08b0f4b7 100644
--- a/packages/rstream-query/test/example.ts
+++ b/packages/rstream-query/test/example.ts
@@ -1,5 +1,5 @@
 import { trace } from "@thi.ng/rstream";
-import * as q from "../src";
+import * as q from "../src/index.js"
 
 const store = new q.TripleStore([
     ["london", "type", "city"],
diff --git a/packages/rstream-query/test/index.ts b/packages/rstream-query/test/index.ts
index 8b2bc0c542..395a1a2c63 100644
--- a/packages/rstream-query/test/index.ts
+++ b/packages/rstream-query/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Triple, TripleIds, TripleStore } from "../src";
+import { Triple, TripleIds, TripleStore } from "../src/index.js"
 
 const triples: Triple[] = [
     ["a", "type", "foo"], // 0
diff --git a/packages/rstream/test/bisect.ts b/packages/rstream/test/bisect.ts
index 534d20e55f..c083376395 100644
--- a/packages/rstream/test/bisect.ts
+++ b/packages/rstream/test/bisect.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { map } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { bisect, fromIterable, Stream, subscription } from "../src";
+import { bisect, fromIterable, Stream, subscription } from "../src/index.js"
 
 let src: Stream<number>;
 
diff --git a/packages/rstream/test/config.ts b/packages/rstream/test/config.ts
index 0c284641e4..6da666b451 100644
--- a/packages/rstream/test/config.ts
+++ b/packages/rstream/test/config.ts
@@ -1,5 +1,5 @@
 import { ConsoleLogger } from "@thi.ng/logger";
-import { setLogger } from "../src";
+import { setLogger } from "../src/index.js"
 
 /**
  * Default base delay for time based tests
diff --git a/packages/rstream/test/debounce.ts b/packages/rstream/test/debounce.ts
index 74f8af92d6..7526e5600f 100644
--- a/packages/rstream/test/debounce.ts
+++ b/packages/rstream/test/debounce.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { debounce, fromIterable } from "../src";
-import { TIMEOUT } from "./config";
+import { debounce, fromIterable } from "../src/index.js"
+import { TIMEOUT } from "./config.js";
 
 group(
     "debounce",
diff --git a/packages/rstream/test/from-atom.ts b/packages/rstream/test/from-atom.ts
index 44d13d5d2b..554695eeb9 100644
--- a/packages/rstream/test/from-atom.ts
+++ b/packages/rstream/test/from-atom.ts
@@ -1,7 +1,7 @@
 import { Atom, Cursor, History } from "@thi.ng/atom";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fromAtom } from "../src";
+import { fromAtom } from "../src/index.js"
 
 // prettier-ignore
 group("fromAtom", {
diff --git a/packages/rstream/test/from-iterable.ts b/packages/rstream/test/from-iterable.ts
index 96a94fd415..4ae48aa8b0 100644
--- a/packages/rstream/test/from-iterable.ts
+++ b/packages/rstream/test/from-iterable.ts
@@ -6,8 +6,8 @@ import {
     State,
     Stream,
     Subscription,
-} from "../src";
-import { TIMEOUT } from "./config";
+} from "../src/index.js"
+import { TIMEOUT } from "./config.js";
 
 let src: Stream<number>;
 let data = [10, 20, 30];
diff --git a/packages/rstream/test/from-promise.ts b/packages/rstream/test/from-promise.ts
index 65ffa714d6..23ccd8ce87 100644
--- a/packages/rstream/test/from-promise.ts
+++ b/packages/rstream/test/from-promise.ts
@@ -1,8 +1,8 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fromIterable, fromPromise, ISubscribable, resolve } from "../src";
-import { TIMEOUT } from "./config";
-import { assertActive } from "./utils";
+import { fromIterable, fromPromise, ISubscribable, resolve } from "../src/index.js"
+import { TIMEOUT } from "./config.js";
+import { assertActive } from "./utils.js";
 
 const dummySub = (src: ISubscribable<any>) => {
     const state = { err: undefined, called: false };
diff --git a/packages/rstream/test/metastream.ts b/packages/rstream/test/metastream.ts
index 24e248698c..b0f476e921 100644
--- a/packages/rstream/test/metastream.ts
+++ b/packages/rstream/test/metastream.ts
@@ -1,8 +1,8 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { CloseMode, fromIterable, metaStream, reactive } from "../src";
-import { TIMEOUT } from "./config";
-import { assertActive, assertUnsub } from "./utils";
+import { CloseMode, fromIterable, metaStream, reactive } from "../src/index.js"
+import { TIMEOUT } from "./config.js";
+import { assertActive, assertUnsub } from "./utils.js";
 
 group(
     "MetaStream",
diff --git a/packages/rstream/test/object.ts b/packages/rstream/test/object.ts
index 9e7dc47cd5..91000a9728 100644
--- a/packages/rstream/test/object.ts
+++ b/packages/rstream/test/object.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { fromObject, stream, Subscription } from "../src";
-import { assertUnsub } from "./utils";
+import { fromObject, stream, Subscription } from "../src/index.js"
+import { assertUnsub } from "./utils.js";
 
 type Foo = { a?: number; b: string };
 
diff --git a/packages/rstream/test/pubsub.ts b/packages/rstream/test/pubsub.ts
index ebf18551af..f919a341c4 100644
--- a/packages/rstream/test/pubsub.ts
+++ b/packages/rstream/test/pubsub.ts
@@ -2,9 +2,9 @@ import { EquivMap } from "@thi.ng/associative";
 import { group } from "@thi.ng/testament";
 import { map, mapIndexed } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { fromIterable, fromIterableSync, PubSub, pubsub } from "../src";
-import { TIMEOUT } from "./config";
-import { assertUnsub } from "./utils";
+import { fromIterable, fromIterableSync, PubSub, pubsub } from "../src/index.js"
+import { TIMEOUT } from "./config.js";
+import { assertUnsub } from "./utils.js";
 
 let pub: PubSub<any, any>;
 
diff --git a/packages/rstream/test/sidechain-partition.ts b/packages/rstream/test/sidechain-partition.ts
index 0054ac99e8..101973148a 100644
--- a/packages/rstream/test/sidechain-partition.ts
+++ b/packages/rstream/test/sidechain-partition.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
-import { sidechainPartition, Stream, stream } from "../src";
-import { assertUnsub } from "./utils";
+import { sidechainPartition, Stream, stream } from "../src/index.js"
+import { assertUnsub } from "./utils.js";
 import { group } from "@thi.ng/testament";
 
 let src: Stream<any>, side: Stream<any>, buf: any[];
diff --git a/packages/rstream/test/sidechain-toggle.ts b/packages/rstream/test/sidechain-toggle.ts
index 5c96407e84..f43b077926 100644
--- a/packages/rstream/test/sidechain-toggle.ts
+++ b/packages/rstream/test/sidechain-toggle.ts
@@ -1,7 +1,7 @@
 import type { Predicate } from "@thi.ng/api";
 import * as assert from "assert";
-import { sidechainToggle, Stream, stream } from "../src";
-import { assertUnsub } from "./utils";
+import { sidechainToggle, Stream, stream } from "../src/index.js"
+import { assertUnsub } from "./utils.js";
 import { group } from "@thi.ng/testament";
 
 let src: Stream<any>, side: Stream<any>, buf: any[];
diff --git a/packages/rstream/test/stream-merge.ts b/packages/rstream/test/stream-merge.ts
index f360df576c..19918fa325 100644
--- a/packages/rstream/test/stream-merge.ts
+++ b/packages/rstream/test/stream-merge.ts
@@ -8,8 +8,8 @@ import {
     merge,
     State,
     StreamMerge,
-} from "../src";
-import { assertActive, assertUnsub } from "./utils";
+} from "../src/index.js"
+import { assertActive, assertUnsub } from "./utils.js";
 
 let src: StreamMerge<number, number>;
 
diff --git a/packages/rstream/test/stream-sync.ts b/packages/rstream/test/stream-sync.ts
index c379fe4235..d7a0bcd815 100644
--- a/packages/rstream/test/stream-sync.ts
+++ b/packages/rstream/test/stream-sync.ts
@@ -12,9 +12,9 @@ import {
     stream,
     sync,
     transduce,
-} from "../src";
-import { TIMEOUT } from "./config";
-import { assertActive, assertUnsub } from "./utils";
+} from "../src/index.js"
+import { TIMEOUT } from "./config.js";
+import { assertActive, assertUnsub } from "./utils.js";
 
 const adder = () =>
     map((ports: any) => {
diff --git a/packages/rstream/test/subscription.ts b/packages/rstream/test/subscription.ts
index 75e4055064..01fecffd3a 100644
--- a/packages/rstream/test/subscription.ts
+++ b/packages/rstream/test/subscription.ts
@@ -10,9 +10,9 @@ import {
     stream,
     Stream,
     subscription,
-} from "../src";
-import { TIMEOUT } from "./config";
-import { assertActive, assertError, assertIdle, assertUnsub } from "./utils";
+} from "../src/index.js"
+import { TIMEOUT } from "./config.js";
+import { assertActive, assertError, assertIdle, assertUnsub } from "./utils.js";
 
 let src: Stream<number>;
 
diff --git a/packages/rstream/test/timeout.ts b/packages/rstream/test/timeout.ts
index 09495c2ca4..894e0ecc83 100644
--- a/packages/rstream/test/timeout.ts
+++ b/packages/rstream/test/timeout.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { timeout } from "../src";
-import { TIMEOUT } from "./config";
+import { timeout } from "../src/index.js"
+import { TIMEOUT } from "./config.js";
 
 group(
     "Timeout",
diff --git a/packages/rstream/test/transducers.ts b/packages/rstream/test/transducers.ts
index 2b9d7eae6e..63cdd2bd36 100644
--- a/packages/rstream/test/transducers.ts
+++ b/packages/rstream/test/transducers.ts
@@ -8,7 +8,7 @@ import {
     take,
 } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { fromIterable, ISubscriber, Stream } from "../src";
+import { fromIterable, ISubscriber, Stream } from "../src/index.js"
 
 let src: Stream<number>;
 let data = [10, 20, 30];
diff --git a/packages/rstream/test/utils.ts b/packages/rstream/test/utils.ts
index 4f737d32f0..0f941c677b 100644
--- a/packages/rstream/test/utils.ts
+++ b/packages/rstream/test/utils.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { ISubscription, State } from "../src";
+import { ISubscription, State } from "../src/index.js"
 
 export const assertState = (x: ISubscription<any, any>, state: State) =>
     assert.strictEqual(x.getState(), state, `${x.id} != ${State[state]}`);
diff --git a/packages/sax/test/index.ts b/packages/sax/test/index.ts
index 36de64d2b7..0135b7cf15 100644
--- a/packages/sax/test/index.ts
+++ b/packages/sax/test/index.ts
@@ -11,7 +11,7 @@ import {
     transduce,
 } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { parse, ParseElement, Type } from "../src";
+import { parse, ParseElement, Type } from "../src/index.js"
 
 const svg = `
 <?xml version="1.0"?>
diff --git a/packages/scenegraph/test/index.ts b/packages/scenegraph/test/index.ts
index 6a127d1cfd..e478678dc1 100644
--- a/packages/scenegraph/test/index.ts
+++ b/packages/scenegraph/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as s from "../src";
+// import * as s from "../src/index.js"
 
 group("scenegraph", {});
diff --git a/packages/seq/test/aseq.ts b/packages/seq/test/aseq.ts
index ddf3cac73d..8cdf6239de 100644
--- a/packages/seq/test/aseq.ts
+++ b/packages/seq/test/aseq.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { aseq } from "../src";
+import { aseq } from "../src/index.js"
 
 group("aseq", {
     basics: () => {
diff --git a/packages/seq/test/concat.ts b/packages/seq/test/concat.ts
index abc6f80dda..620c2e80d1 100644
--- a/packages/seq/test/concat.ts
+++ b/packages/seq/test/concat.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { aseq, concat, concatA, iterator, rseq } from "../src";
+import { aseq, concat, concatA, iterator, rseq } from "../src/index.js"
 
 group("concat / iterator", {
     concat: () => {
diff --git a/packages/seq/test/cons.ts b/packages/seq/test/cons.ts
index 4c54bd2d19..2af256745c 100644
--- a/packages/seq/test/cons.ts
+++ b/packages/seq/test/cons.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { cons } from "../src";
+import { cons } from "../src/index.js"
 
 group("cons", {
     cons: () => {
diff --git a/packages/seq/test/custom.ts b/packages/seq/test/custom.ts
index 980d09d8b6..7d8d1a55b4 100644
--- a/packages/seq/test/custom.ts
+++ b/packages/seq/test/custom.ts
@@ -1,7 +1,7 @@
 import type { ISeqable } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { concat, ensureSeq, iterator } from "../src";
+import { concat, ensureSeq, iterator } from "../src/index.js"
 
 export class Range implements ISeqable<number> {
     n: number;
diff --git a/packages/seq/test/lazyseq.ts b/packages/seq/test/lazyseq.ts
index 0df6de772e..4591fd2bdb 100644
--- a/packages/seq/test/lazyseq.ts
+++ b/packages/seq/test/lazyseq.ts
@@ -1,7 +1,7 @@
 import type { ISeq } from "@thi.ng/api";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { cons, lazyseq } from "../src";
+import { cons, lazyseq } from "../src/index.js"
 
 group("lazyseq", {
     lazyseq: () => {
diff --git a/packages/seq/test/rseq.ts b/packages/seq/test/rseq.ts
index 204028aa59..64b75bbb4a 100644
--- a/packages/seq/test/rseq.ts
+++ b/packages/seq/test/rseq.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { rseq } from "../src";
+import { rseq } from "../src/index.js"
 
 group("rseq", {
     basics: () => {
diff --git a/packages/sexpr/test/index.ts b/packages/sexpr/test/index.ts
index b468db9bcc..bcbae972bd 100644
--- a/packages/sexpr/test/index.ts
+++ b/packages/sexpr/test/index.ts
@@ -10,7 +10,7 @@ import {
     Sym,
     SyntaxOpts,
     tokenize,
-} from "../src";
+} from "../src/index.js"
 
 const ops = defmulti<ASTNode, ASTNode[], any, any>((x) => (<Sym>x).value);
 
diff --git a/packages/shader-ast-glsl/test/index.ts b/packages/shader-ast-glsl/test/index.ts
index 7659887e91..646f662172 100644
--- a/packages/shader-ast-glsl/test/index.ts
+++ b/packages/shader-ast-glsl/test/index.ts
@@ -20,7 +20,7 @@ import {
 } from "@thi.ng/shader-ast";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { GLSLVersion, targetGLSL } from "../src";
+import { GLSLVersion, targetGLSL } from "../src/index.js"
 
 const vs100 = targetGLSL({
     type: "vs",
diff --git a/packages/shader-ast-js/test/index.ts b/packages/shader-ast-js/test/index.ts
index 9c6c58d260..9800139157 100644
--- a/packages/shader-ast-js/test/index.ts
+++ b/packages/shader-ast-js/test/index.ts
@@ -2,7 +2,7 @@ import { bvec2, defn, greaterThan, ret, vec2 } from "@thi.ng/shader-ast";
 import { group } from "@thi.ng/testament";
 import { eqDelta2 } from "@thi.ng/vectors";
 import * as assert from "assert";
-import { JS_DEFAULT_ENV, targetJS } from "../src";
+import { JS_DEFAULT_ENV, targetJS } from "../src/index.js"
 
 group("shader-ast-js", {
     vec2: () => {
diff --git a/packages/shader-ast-optimize/test/index.ts b/packages/shader-ast-optimize/test/index.ts
index b41676fc10..4b450ab19e 100644
--- a/packages/shader-ast-optimize/test/index.ts
+++ b/packages/shader-ast-optimize/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("shader-ast-optimize", {
 
diff --git a/packages/shader-ast-stdlib/test/index.ts b/packages/shader-ast-stdlib/test/index.ts
index 01a4c5ed0d..2dd851c9a2 100644
--- a/packages/shader-ast-stdlib/test/index.ts
+++ b/packages/shader-ast-stdlib/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as sas from "../src";
+// import * as sas from "../src/index.js"
 
 group("shader-ast-stdlib", {});
diff --git a/packages/shader-ast/test/index.ts b/packages/shader-ast/test/index.ts
index 6b0f48a285..1846bc5b27 100644
--- a/packages/shader-ast/test/index.ts
+++ b/packages/shader-ast/test/index.ts
@@ -14,7 +14,7 @@ import {
     TRUE,
     vec2,
     vec3,
-} from "../src";
+} from "../src/index.js"
 
 group("shader-ast", {
     "op2 type infer mulvv": () => {
diff --git a/packages/simd/test/index.ts b/packages/simd/test/index.ts
index b99ed6c40c..584f8e7299 100644
--- a/packages/simd/test/index.ts
+++ b/packages/simd/test/index.ts
@@ -1,6 +1,6 @@
 import { equiv } from "@thi.ng/equiv";
 import { eqDelta } from "@thi.ng/vectors";
-import { init } from "../src";
+import { init } from "../src/index.js"
 
 const DEST = 0x400;
 
diff --git a/packages/soa/test/aos.ts b/packages/soa/test/aos.ts
index 4050a38cb4..7a8c07e9e5 100644
--- a/packages/soa/test/aos.ts
+++ b/packages/soa/test/aos.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { aos } from "../src";
+import { aos } from "../src/index.js"
 
 group("aos", {
     basic: () => {
diff --git a/packages/soa/test/serialize.ts b/packages/soa/test/serialize.ts
index 1cc7558264..22008ed801 100644
--- a/packages/soa/test/serialize.ts
+++ b/packages/soa/test/serialize.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { scalar, serializer, soa, utf8z } from "../src";
+import { scalar, serializer, soa, utf8z } from "../src/index.js"
 
 group("serialize", {
     scalar: () => {
diff --git a/packages/soa/test/soa.ts b/packages/soa/test/soa.ts
index 57d8e92acb..0ee909af66 100644
--- a/packages/soa/test/soa.ts
+++ b/packages/soa/test/soa.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { soa } from "../src";
+import { soa } from "../src/index.js"
 
 group("soa", {
     basic: () => {
diff --git a/packages/sparse/test/index.ts b/packages/sparse/test/index.ts
index 0e193e7945..28bd004a8c 100644
--- a/packages/sparse/test/index.ts
+++ b/packages/sparse/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { SparseVec } from "../src";
+import { SparseVec } from "../src/index.js"
 
 group("sparsevec", {
     fromDense: () => {
diff --git a/packages/strings/test/escape.ts b/packages/strings/test/escape.ts
index f4a39380e1..ac70e9fa5c 100644
--- a/packages/strings/test/escape.ts
+++ b/packages/strings/test/escape.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { escape, unescape } from "../src";
+import { escape, unescape } from "../src/index.js"
 
 const SRC = "\ta\nb😎c£\\\x00";
 
diff --git a/packages/strings/test/index.ts b/packages/strings/test/index.ts
index 86151032ec..63544baf49 100644
--- a/packages/strings/test/index.ts
+++ b/packages/strings/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import * as str from "../src";
+import * as str from "../src/index.js"
 
 group("strings", {
     padLeft: () => {
diff --git a/packages/strings/test/interpolate.ts b/packages/strings/test/interpolate.ts
index 3b94d9ad05..90fa535f5e 100644
--- a/packages/strings/test/interpolate.ts
+++ b/packages/strings/test/interpolate.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { interpolateKeys } from "../src";
+import { interpolateKeys } from "../src/index.js"
 
 group("interpolateKeys", {
     basic: () => {
diff --git a/packages/strings/test/splice.ts b/packages/strings/test/splice.ts
index 31d33954e1..7883781a29 100644
--- a/packages/strings/test/splice.ts
+++ b/packages/strings/test/splice.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { splice } from "../src";
+import { splice } from "../src/index.js"
 
 const SRC = "abc";
 
diff --git a/packages/system/test/index.ts b/packages/system/test/index.ts
index 13ef196dd6..7dc8383f6b 100644
--- a/packages/system/test/index.ts
+++ b/packages/system/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { defSystem, ILifecycle } from "../src";
+import { defSystem, ILifecycle } from "../src/index.js"
 
 group("system", {
     basic: async () => {
diff --git a/packages/text-canvas/test/index.ts b/packages/text-canvas/test/index.ts
index c58dae6af9..35a17cf2e6 100644
--- a/packages/text-canvas/test/index.ts
+++ b/packages/text-canvas/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("text-canvas", {});
diff --git a/packages/text-format/test/index.ts b/packages/text-format/test/index.ts
index 126c7df465..b947298a6b 100644
--- a/packages/text-format/test/index.ts
+++ b/packages/text-format/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { } from "../src";
+// import { } from "../src/index.js"
 
 group("text-format", {});
diff --git a/packages/transducers-binary/test/index.ts b/packages/transducers-binary/test/index.ts
index 33c54fef44..960466534c 100644
--- a/packages/transducers-binary/test/index.ts
+++ b/packages/transducers-binary/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as tb from "../src";
+// import * as tb from "../src/index.js"
 
 group("transducers-binary", {});
diff --git a/packages/transducers-binary/test/partition-bits.ts b/packages/transducers-binary/test/partition-bits.ts
index 41fee40455..fff50af6fd 100644
--- a/packages/transducers-binary/test/partition-bits.ts
+++ b/packages/transducers-binary/test/partition-bits.ts
@@ -10,7 +10,7 @@ import {
     run,
 } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { bits, partitionBits } from "../src";
+import { bits, partitionBits } from "../src/index.js"
 
 const src = [0xff, 0xa5, 0xfe, 0xf7];
 
diff --git a/packages/transducers-fsm/test/index.ts b/packages/transducers-fsm/test/index.ts
index e406d5c758..5d5eca1f6f 100644
--- a/packages/transducers-fsm/test/index.ts
+++ b/packages/transducers-fsm/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { comp, iterator, map, range, takeNth } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { fsm } from "../src";
+import { fsm } from "../src/index.js"
 
 group("transducers-fsm", {
     "readme example": () => {
diff --git a/packages/transducers-hdom/test/index.ts b/packages/transducers-hdom/test/index.ts
index 42a3d16b88..17b6ba705a 100644
--- a/packages/transducers-hdom/test/index.ts
+++ b/packages/transducers-hdom/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import { updateUI } from "../src";
+// import { updateUI } from "../src/index.js"
 
 group("transducers-hdom", {});
diff --git a/packages/transducers-patch/test/index.ts b/packages/transducers-patch/test/index.ts
index e5d2cdb074..f25623bd7e 100644
--- a/packages/transducers-patch/test/index.ts
+++ b/packages/transducers-patch/test/index.ts
@@ -1,7 +1,7 @@
 import { group } from "@thi.ng/testament";
 import { reduce, reductions } from "@thi.ng/transducers";
 import * as assert from "assert";
-import { patchArray, patchObj } from "../src";
+import { patchArray, patchObj } from "../src/index.js"
 
 group("transducers-patch", {
     patchArray: () => {
diff --git a/packages/transducers-stats/test/index.ts b/packages/transducers-stats/test/index.ts
index 109864424d..3164f92444 100644
--- a/packages/transducers-stats/test/index.ts
+++ b/packages/transducers-stats/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as transducers-stats from "../src";
+// import * as transducers-stats from "../src/index.js"
 
 group("transducers-stats", {});
diff --git a/packages/transducers/test/drop.ts b/packages/transducers/test/drop.ts
index 49e3b92073..b32224eebf 100644
--- a/packages/transducers/test/drop.ts
+++ b/packages/transducers/test/drop.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { drop, range } from "../src";
+import { drop, range } from "../src/index.js"
 
 group("drop", {
     "starts iterating after N items": () => {
diff --git a/packages/transducers/test/filter.ts b/packages/transducers/test/filter.ts
index a91b36ffa5..d43cdc4c8b 100644
--- a/packages/transducers/test/filter.ts
+++ b/packages/transducers/test/filter.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { filter, range } from "../src";
+import { filter, range } from "../src/index.js"
 
 const identity = (x: any) => x;
 const always = () => true;
diff --git a/packages/transducers/test/flatten.ts b/packages/transducers/test/flatten.ts
index 16d1a3bc76..0f4ee122c7 100644
--- a/packages/transducers/test/flatten.ts
+++ b/packages/transducers/test/flatten.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { flatten, range } from "../src";
+import { flatten, range } from "../src/index.js"
 
 group("flatten", {
     "empty arrays": () => {
diff --git a/packages/transducers/test/fuzzy.ts b/packages/transducers/test/fuzzy.ts
index 244ae38473..60a5339806 100644
--- a/packages/transducers/test/fuzzy.ts
+++ b/packages/transducers/test/fuzzy.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { filterFuzzy } from "../src";
+import { filterFuzzy } from "../src/index.js"
 
 group("fuzzy", {
     strings: () => {
diff --git a/packages/transducers/test/juxtr.ts b/packages/transducers/test/juxtr.ts
index f755af06fd..a44d99cad3 100644
--- a/packages/transducers/test/juxtr.ts
+++ b/packages/transducers/test/juxtr.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import * as tx from "../src";
+import * as tx from "../src/index.js"
 
 const src = [1, 2, 3, 4];
 
diff --git a/packages/transducers/test/keyperms.ts b/packages/transducers/test/keyperms.ts
index e037603e1a..4d41310f8b 100644
--- a/packages/transducers/test/keyperms.ts
+++ b/packages/transducers/test/keyperms.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { keyPermutations } from "../src";
+import { keyPermutations } from "../src/index.js"
 
 group("keyPermutations", {
     basic: () => {
diff --git a/packages/transducers/test/map-deep.ts b/packages/transducers/test/map-deep.ts
index b32da2dcd4..365cbac5cf 100644
--- a/packages/transducers/test/map-deep.ts
+++ b/packages/transducers/test/map-deep.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { deepTransform } from "../src";
+import { deepTransform } from "../src/index.js"
 
 group("deepTransform", {
     "transforms hiccup": () => {
diff --git a/packages/transducers/test/map.ts b/packages/transducers/test/map.ts
index 84bd16fbbc..1b36f40a32 100644
--- a/packages/transducers/test/map.ts
+++ b/packages/transducers/test/map.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { map, range } from "../src";
+import { map, range } from "../src/index.js"
 
 const identity = <T>(t: T): T => t;
 const upper = (s: string) => s.toUpperCase();
diff --git a/packages/transducers/test/pad-last.ts b/packages/transducers/test/pad-last.ts
index c9785a3a9b..54c31644b4 100644
--- a/packages/transducers/test/pad-last.ts
+++ b/packages/transducers/test/pad-last.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { padLast } from "../src";
+import { padLast } from "../src/index.js"
 
 group("padLast", {
     all: () => {
diff --git a/packages/transducers/test/partition-sync.ts b/packages/transducers/test/partition-sync.ts
index acbb285063..68011c0341 100644
--- a/packages/transducers/test/partition-sync.ts
+++ b/packages/transducers/test/partition-sync.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { partitionSync, step } from "../src";
+import { partitionSync, step } from "../src/index.js"
 
 const src = [
     ["a", 1],
diff --git a/packages/transducers/test/permutations.ts b/packages/transducers/test/permutations.ts
index bc4da88487..2f6ac22e8f 100644
--- a/packages/transducers/test/permutations.ts
+++ b/packages/transducers/test/permutations.ts
@@ -1,7 +1,7 @@
 import { swizzle } from "@thi.ng/arrays";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { iterator, map, permutations, permutationsN, range } from "../src";
+import { iterator, map, permutations, permutationsN, range } from "../src/index.js"
 
 group("permutations", {
     empty: () => {
diff --git a/packages/transducers/test/range.ts b/packages/transducers/test/range.ts
index b35e4eaaef..378a721a3d 100644
--- a/packages/transducers/test/range.ts
+++ b/packages/transducers/test/range.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { range2d, rangeNd } from "../src";
+import { range2d, rangeNd } from "../src/index.js"
 
 group("range2d", {
     forward: () => {
diff --git a/packages/transducers/test/take.ts b/packages/transducers/test/take.ts
index df69d4c493..435ded9caf 100644
--- a/packages/transducers/test/take.ts
+++ b/packages/transducers/test/take.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { range, take } from "../src";
+import { range, take } from "../src/index.js"
 
 group("take", {
     "iterates up to N items": () => {
diff --git a/packages/unionstruct/test/index.ts b/packages/unionstruct/test/index.ts
index 5de0787161..50bf68a7fb 100644
--- a/packages/unionstruct/test/index.ts
+++ b/packages/unionstruct/test/index.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Field, struct, union } from "../src";
+import { Field, struct, union } from "../src/index.js"
 
 let i = <Field[]>[
     ["f64", "f64"],
diff --git a/packages/vclock/test/index.ts b/packages/vclock/test/index.ts
index 097a55ca01..71d956de3c 100644
--- a/packages/vclock/test/index.ts
+++ b/packages/vclock/test/index.ts
@@ -8,7 +8,7 @@ import {
     remove,
     signedSkew,
     VClock,
-} from "../src";
+} from "../src/index.js"
 
 group("vclock", {
     inc: () => {
diff --git a/packages/vector-pools/test/attribs.ts b/packages/vector-pools/test/attribs.ts
index 79fd03235a..f676168e99 100644
--- a/packages/vector-pools/test/attribs.ts
+++ b/packages/vector-pools/test/attribs.ts
@@ -1,7 +1,7 @@
 import { equiv } from "@thi.ng/equiv";
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { AttribPool } from "../src/attrib-pool";
+import { AttribPool } from "../src/index.js";
 
 group("vector-pools", {
     attribs: () => {
diff --git a/packages/vectors/test/index.ts b/packages/vectors/test/index.ts
index 68372cea0f..3f340bb8f6 100644
--- a/packages/vectors/test/index.ts
+++ b/packages/vectors/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as v from "../src";
+// import * as v from "../src/index.js"
 
 group("vectors", {});
diff --git a/packages/viz/test/index.ts b/packages/viz/test/index.ts
index 230a278066..ef3b047a5f 100644
--- a/packages/viz/test/index.ts
+++ b/packages/viz/test/index.ts
@@ -7,7 +7,7 @@ import {
     linearAxis,
     linearTicks,
     uniformDomain,
-} from "../src";
+} from "../src/index.js"
 
 group("viz", {
     uniformDomain: () => {
diff --git a/packages/webgl-msdf/test/index.ts b/packages/webgl-msdf/test/index.ts
index a97150bd15..c39e89d3b9 100644
--- a/packages/webgl-msdf/test/index.ts
+++ b/packages/webgl-msdf/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as wm from "../src";
+// import * as wm from "../src/index.js"
 
 group("webgl-msdf", {});
diff --git a/packages/webgl-shadertoy/test/index.ts b/packages/webgl-shadertoy/test/index.ts
index dfc6456c96..4780136f0a 100644
--- a/packages/webgl-shadertoy/test/index.ts
+++ b/packages/webgl-shadertoy/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as ws from "../src";
+// import * as ws from "../src/index.js"
 
 group("webgl-shadertoy", {});
diff --git a/packages/webgl/test/index.ts b/packages/webgl/test/index.ts
index 8cd29c0718..86632bc575 100644
--- a/packages/webgl/test/index.ts
+++ b/packages/webgl/test/index.ts
@@ -1,5 +1,5 @@
 import { group } from "@thi.ng/testament";
 // import * as assert from "assert";
-// import * as w from "../src";
+// import * as w from "../src/index.js"
 
 group("webgl", {});
diff --git a/packages/zipper/test/array.ts b/packages/zipper/test/array.ts
index 47d1ab3649..f243246f95 100644
--- a/packages/zipper/test/array.ts
+++ b/packages/zipper/test/array.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { arrayZipper, Location } from "../src";
+import { arrayZipper, Location } from "../src/index.js"
 
 let src: any[];
 let a: Location<number | number[] | (number | number[])[]>;
diff --git a/packages/zipper/test/custom.ts b/packages/zipper/test/custom.ts
index 2fd8fe75df..7722d5f95a 100644
--- a/packages/zipper/test/custom.ts
+++ b/packages/zipper/test/custom.ts
@@ -1,6 +1,6 @@
 import { group } from "@thi.ng/testament";
 import * as assert from "assert";
-import { Location, zipper } from "../src";
+import { Location, zipper } from "../src/index.js"
 
 interface Branch {
     type: "root" | "branch";