diff --git a/.changeset/neat-garlics-return.md b/.changeset/neat-garlics-return.md
new file mode 100644
index 0000000..67c4335
--- /dev/null
+++ b/.changeset/neat-garlics-return.md
@@ -0,0 +1,5 @@
+---
+"@effect/build-utils": patch
+---
+
+Take `type` from package.json
diff --git a/src/PackV5.ts b/src/PackV5.ts
index f37ef6b..cb5d81a 100644
--- a/src/PackV5.ts
+++ b/src/PackV5.ts
@@ -47,6 +47,7 @@ export const run = Effect.gen(function*() {
   const buildPackageJson = Effect.sync(() => {
     const out: Record<string, any> = {
       name: ctx.packageJson.name,
+      type: ctx.packageJson.type,
       version: ctx.packageJson.version,
       description: ctx.packageJson.description,
       license: ctx.packageJson.license,
diff --git a/src/PackageContext.ts b/src/PackageContext.ts
index f51266a..3bf9f84 100644
--- a/src/PackageContext.ts
+++ b/src/PackageContext.ts
@@ -48,6 +48,9 @@ export class PackageJson extends Schema.Class<PackageJson>("PackageJson")({
   name: Schema.String,
   version: Schema.String,
   description: Schema.String,
+  type: Schema.optionalWith(Schema.Literal("commonjs", "module"), {
+    default: () => "commonjs"
+  }),
   private: Schema.optionalWith(Schema.Boolean, { default: () => false }),
   publishConfig: Schema.optional(Schema.Struct({
     provenance: Schema.optionalWith(Schema.Boolean, { default: () => false }),