diff --git a/.gitignore b/.gitignore
index 5691469f..953d9319 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,4 @@ node_modules
 
 lib
 dist
+types
diff --git a/.travis.yml b/.travis.yml
index 43654a99..5ac5ceaf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,6 +39,7 @@ before_install:
   # allow windows to run scripts with node 14 and npm 7 (may not be necessary when node 14 is no longer lts)
   - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then npm config set script-shell c:/PROGRA~1/Git/bin/bash.exe ; fi
 
+before_script: npm run build
 script: npx nyc -s npm run test -- -- -- -t node --bail
 after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
 
@@ -85,10 +86,7 @@ jobs:
 
     - stage: test
       name: electron main
-      addons:
-        firefox: latest
-      script: 
-        - npm run build
+      script:
         - npx lerna link # use publishConfig.directory
         - npm run test -- -- -- -t electron-main -f dist/cjs/node-test/*js
 
diff --git a/package.json b/package.json
index a5d029b0..02fd243d 100644
--- a/package.json
+++ b/package.json
@@ -16,8 +16,7 @@
     "update-contributors": "aegir release --lint=false --test=false --bump=false --build=false --changelog=false --commit=false --tag=false --push=false --ghrelease=false --docs=false --publish=false"
   },
   "devDependencies": {
-    "lerna": "^3.22.1",
-    "json": "^11.0.0"
+    "lerna": "^3.22.1"
   },
   "repository": {
     "type": "git",
diff --git a/packages/ipfs-unixfs-exporter/.aegir.cjs b/packages/ipfs-unixfs-exporter/.aegir.cjs
index 139ce023..7c48d0be 100644
--- a/packages/ipfs-unixfs-exporter/.aegir.cjs
+++ b/packages/ipfs-unixfs-exporter/.aegir.cjs
@@ -32,5 +32,8 @@ module.exports = {
         buildConfig
       }
     }
+  },
+  ts: {
+    copyTo: 'types'
   }
 }
diff --git a/packages/ipfs-unixfs-exporter/package.json b/packages/ipfs-unixfs-exporter/package.json
index 480c334a..d3447c34 100644
--- a/packages/ipfs-unixfs-exporter/package.json
+++ b/packages/ipfs-unixfs-exporter/package.json
@@ -9,9 +9,10 @@
     "fs": false
   },
   "scripts": {
-    "prepare": "aegir build --no-bundle",
+    "prepare": "aegir build --no-bundle && cp -R types dist",
+    "pretest": "aegir build --esm-tests",
     "test": "aegir test",
-    "build": "aegir build --esm-tests",
+    "build": "aegir build && cp -R types dist",
     "preleaseOnly": "npx json -I -f dist/package.json -e this.types='\"src/index.d.ts\"'",
     "clean": "rimraf ./dist",
     "lint": "aegir ts -p check && aegir lint",
@@ -50,7 +51,6 @@
     "it-buffer-stream": "^2.0.0",
     "it-first": "^1.0.6",
     "merge-options": "^3.0.4",
-    "murmurhash3js-revisited": "^3.0.0",
     "native-abort-controller": "^1.0.3",
     "nyc": "^15.0.0",
     "readable-stream": "^3.6.0",
@@ -61,16 +61,16 @@
   "dependencies": {
     "@ipld/dag-cbor": "^6.0.4",
     "@ipld/dag-pb": "^2.0.2",
+    "@multiformats/murmur3": "^1.0.3",
     "err-code": "^3.0.1",
     "hamt-sharding": "^2.0.0",
     "interface-blockstore": "^1.0.0",
     "ipfs-unixfs": "^6.0.2",
     "it-last": "^1.0.5",
     "multiformats": "^9.4.2",
-    "murmurhash3js-revisited": "^3.0.0",
     "uint8arrays": "^3.0.0"
   },
-  "types": "dist/src/index.d.ts",
+  "types": "types/src/index.d.ts",
   "eslintConfig": {
     "extends": "ipfs",
     "parserOptions": {
diff --git a/packages/ipfs-unixfs-exporter/src/utils/find-cid-in-shard.js b/packages/ipfs-unixfs-exporter/src/utils/find-cid-in-shard.js
index 285a0116..6945690c 100644
--- a/packages/ipfs-unixfs-exporter/src/utils/find-cid-in-shard.js
+++ b/packages/ipfs-unixfs-exporter/src/utils/find-cid-in-shard.js
@@ -1,9 +1,7 @@
 
 import { Bucket, createHAMT } from 'hamt-sharding'
 import { decode } from '@ipld/dag-pb'
-// @ts-ignore - no types available
-import mur from 'murmurhash3js-revisited'
-import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
+import { murmur3128 } from '@multiformats/murmur3'
 
 /**
  * @typedef {import('interface-blockstore').Blockstore} Blockstore
@@ -18,7 +16,13 @@ import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
  * @param {Uint8Array} buf
  */
 const hashFn = async function (buf) {
-  return uint8ArrayFromString(mur.x64.hash128(buf), 'base16').slice(0, 8).reverse()
+  return (await murmur3128.encode(buf))
+    // Murmur3 outputs 128 bit but, accidentally, IPFS Go's
+    // implementation only uses the first 64, so we must do the same
+    // for parity..
+    .slice(0, 8)
+    // Invert buffer because that's how Go impl does it
+    .reverse()
 }
 
 /**
diff --git a/packages/ipfs-unixfs-exporter/test/importer.spec.js b/packages/ipfs-unixfs-exporter/test/importer.spec.js
index 74efa7da..28dd168b 100644
--- a/packages/ipfs-unixfs-exporter/test/importer.spec.js
+++ b/packages/ipfs-unixfs-exporter/test/importer.spec.js
@@ -1094,7 +1094,6 @@ describe('configuration', () => {
       path: 'path',
       content: asAsyncIterable(uint8ArrayFromString('content'))
     }], block, {
-      /** @type {import('ipfs-unixfs-importer').ChunkValidator} */
       chunkValidator: async function * (source) { // eslint-disable-line require-await
         validated = true
 
@@ -1106,7 +1105,6 @@ describe('configuration', () => {
           }
         }
       },
-      /** @type {import('ipfs-unixfs-importer').Chunker} */
       chunker: async function * (source) { // eslint-disable-line require-await
         chunked = true
         yield * source
diff --git a/packages/ipfs-unixfs-exporter/tsconfig.json b/packages/ipfs-unixfs-exporter/tsconfig.json
index 446917f2..c490e3c1 100644
--- a/packages/ipfs-unixfs-exporter/tsconfig.json
+++ b/packages/ipfs-unixfs-exporter/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "aegir/src/config/tsconfig.aegir.json",
   "compilerOptions": {
-    "outDir": "dist",
+    "outDir": "types",
     "module": "es2020",
     "importsNotUsedAsValues": "preserve"
   },
@@ -16,6 +16,9 @@
   "references": [
     {
       "path": "../ipfs-unixfs"
+    },
+    {
+      "path": "../ipfs-unixfs-importer"
     }
   ]
 }
diff --git a/packages/ipfs-unixfs-importer/.aegir.cjs b/packages/ipfs-unixfs-importer/.aegir.cjs
index fbe2f018..6abe4ea8 100644
--- a/packages/ipfs-unixfs-importer/.aegir.cjs
+++ b/packages/ipfs-unixfs-importer/.aegir.cjs
@@ -32,5 +32,8 @@ module.exports = {
         buildConfig
       }
     }
+  },
+  ts: {
+    copyTo: 'types'
   }
 }
diff --git a/packages/ipfs-unixfs-importer/package.json b/packages/ipfs-unixfs-importer/package.json
index 57979cd6..69940433 100644
--- a/packages/ipfs-unixfs-importer/package.json
+++ b/packages/ipfs-unixfs-importer/package.json
@@ -9,9 +9,10 @@
     "fs": false
   },
   "scripts": {
-    "prepare": "aegir build --no-bundle",
+    "prepare": "aegir build --no-bundle && cp -R types dist",
+    "pretest": "aegir build --esm-tests",
     "test": "aegir test",
-    "build": "aegir build --esm-tests",
+    "build": "aegir build && cp -R types dist",
     "preleaseOnly": "npx json -I -f dist/package.json -e this.types='\"src/index.d.ts\"'",
     "clean": "rimraf ./dist",
     "lint": "aegir ts -p check && aegir lint",
@@ -52,6 +53,7 @@
   },
   "dependencies": {
     "@ipld/dag-pb": "^2.0.2",
+    "@multiformats/murmur3": "^1.0.3",
     "bl": "^5.0.0",
     "err-code": "^3.0.1",
     "hamt-sharding": "^2.0.0",
@@ -63,11 +65,10 @@
     "it-parallel-batch": "^1.0.9",
     "merge-options": "^3.0.4",
     "multiformats": "^9.4.2",
-    "murmurhash3js-revisited": "^3.0.0",
     "rabin-wasm": "^0.1.4",
     "uint8arrays": "^3.0.0"
   },
-  "types": "dist/src/index.d.ts",
+  "types": "types/src/index.d.ts",
   "eslintConfig": {
     "extends": "ipfs",
     "parserOptions": {
diff --git a/packages/ipfs-unixfs-importer/src/options.js b/packages/ipfs-unixfs-importer/src/options.js
index de0b0acc..39efd91e 100644
--- a/packages/ipfs-unixfs-importer/src/options.js
+++ b/packages/ipfs-unixfs-importer/src/options.js
@@ -1,8 +1,6 @@
 import mergeOptions from 'merge-options'
 import { sha256 } from 'multiformats/hashes/sha2'
-// @ts-ignore - no types available
-import mur from 'murmurhash3js-revisited'
-import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
+import { murmur3128 } from '@multiformats/murmur3'
 
 mergeOptions.bind({ ignoreUndefined: true })
 
@@ -10,7 +8,7 @@ mergeOptions.bind({ ignoreUndefined: true })
  * @param {Uint8Array} buf
  */
 async function hamtHashFn (buf) {
-  return uint8ArrayFromString(mur.x64.hash128(buf), 'base16')
+  return (await murmur3128.encode(buf))
     // Murmur3 outputs 128 bit but, accidentally, IPFS Go's
     // implementation only uses the first 64, so we must do the same
     // for parity..
diff --git a/packages/ipfs-unixfs-importer/tsconfig.json b/packages/ipfs-unixfs-importer/tsconfig.json
index 446917f2..c69a39ac 100644
--- a/packages/ipfs-unixfs-importer/tsconfig.json
+++ b/packages/ipfs-unixfs-importer/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "aegir/src/config/tsconfig.aegir.json",
   "compilerOptions": {
-    "outDir": "dist",
+    "outDir": "types",
     "module": "es2020",
     "importsNotUsedAsValues": "preserve"
   },
diff --git a/packages/ipfs-unixfs/.aegir.cjs b/packages/ipfs-unixfs/.aegir.cjs
index 7297ccbd..6622ba0a 100644
--- a/packages/ipfs-unixfs/.aegir.cjs
+++ b/packages/ipfs-unixfs/.aegir.cjs
@@ -4,5 +4,8 @@
 module.exports = {
   build: {
     bundlesizeMax: '11KB'
+  },
+  ts: {
+    copyTo: 'types'
   }
 }
diff --git a/packages/ipfs-unixfs/package.json b/packages/ipfs-unixfs/package.json
index 89dd8fe6..9039489e 100644
--- a/packages/ipfs-unixfs/package.json
+++ b/packages/ipfs-unixfs/package.json
@@ -9,13 +9,12 @@
     "fs": false
   },
   "scripts": {
-    "prepare": "aegir build",
+    "prepare": "aegir build --no-bundle && cp -R types dist",
     "prepare:proto": "pbjs -t static-module -w es6 -r ipfs-unixfs --force-number --no-verify --no-delimited --no-create --no-beautify --no-defaults --lint eslint-disable -o src/unixfs.js ./src/unixfs.proto",
     "prepare:proto-types": "pbts -o src/unixfs.d.ts src/unixfs.js",
-    "prepare:types": "aegir build --no-bundle",
+    "pretest": "aegir build --esm-tests",
     "test": "aegir test",
-    "build": "aegir build --esm-tests",
-    "preleaseOnly": "npx json -I -f dist/package.json -e this.types='\"src/index.d.ts\"'",
+    "build": "aegir build && cp -R types dist",
     "clean": "rimraf ./dist",
     "lint": "aegir ts -p check && aegir lint",
     "coverage": "nyc -s aegir test -t node && nyc report --reporter=html",
@@ -54,7 +53,7 @@
     "err-code": "^3.0.1",
     "protobufjs": "^6.10.2"
   },
-  "types": "dist/src/index.d.ts",
+  "types": "types/src/index.d.ts",
   "eslintConfig": {
     "extends": "ipfs",
     "parserOptions": {
diff --git a/packages/ipfs-unixfs/tsconfig.json b/packages/ipfs-unixfs/tsconfig.json
index f06b4656..7c8a6394 100644
--- a/packages/ipfs-unixfs/tsconfig.json
+++ b/packages/ipfs-unixfs/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "aegir/src/config/tsconfig.aegir.json",
   "compilerOptions": {
-    "outDir": "dist"
+    "outDir": "types"
   },
   "include": [
     "src",