diff --git a/.changeset/calm-meals-smile.md b/.changeset/calm-meals-smile.md
new file mode 100644
index 0000000..8355abb
--- /dev/null
+++ b/.changeset/calm-meals-smile.md
@@ -0,0 +1,5 @@
+---
+"@effect/build-utils": patch
+---
+
+add directory field to package.json
diff --git a/src/PackageContext.ts b/src/PackageContext.ts
index bf9bbb7..5c7916e 100644
--- a/src/PackageContext.ts
+++ b/src/PackageContext.ts
@@ -57,6 +57,7 @@ export class PackageJson extends Schema.Class<PackageJson>()({
     Schema.struct({
       type: Schema.string,
       url: Schema.string,
+      directory: Schema.optional(Schema.string),
     }),
   ),
   dependencies: Schema.optional(Schema.record(Schema.string, Schema.string)),