diff --git a/package.json b/package.json
index e5bf6b9..e3557d8 100755
--- a/package.json
+++ b/package.json
@@ -2,13 +2,13 @@
   "name": "@grame/faustwasm",
   "version": "0.11.0",
   "description": "WebAssembly version of Faust Compiler",
-  "main": "dist/cjs/index.js",
+  "main": "dist/cjs/index.cjs",
   "types": "dist/esm/index.d.ts",
   "module": "dist/esm/index.js",
   "type": "module",
   "scripts": {
     "build": "npm run build-cjs && npm run build-cjs-bundle && npm run build-esm && npm run build-esm-bundle && node postbuild-bundled.js & npm run build-types & npm run build-types-bundle",
-    "build-cjs": "esbuild src/index.ts --target=es2019 --bundle --sourcemap --outdir=dist/cjs --format=iife --external:fs --external:url",
+    "build-cjs": "esbuild src/index.ts --target=es2019 --bundle --sourcemap --outfile=dist/cjs/index.cjs --platform=node --format=cjs --external:fs --external:url",
     "build-cjs-bundle": "node prebuild-bundled.js && esbuild src/index-bundle-iife.ts --target=es2019 --bundle --sourcemap --loader:.wasm=binary --loader:.data=binary --outfile=dist/cjs-bundle/index.js --format=iife --external:fs --external:url --external:path --external:ws && node postbuild-bundled.js",
     "build-esm": "esbuild src/index.ts --target=es2019 --bundle --sourcemap --outdir=dist/esm --format=esm --external:fs --external:url",
     "build-esm-bundle": "node prebuild-bundled.js && esbuild src/index-bundle.ts --target=es2019 --bundle --sourcemap --loader:.wasm=binary --loader:.data=binary --outfile=dist/esm-bundle/index.js --format=esm --external:fs --external:url --external:path --external:ws && node postbuild-bundled.js",