diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..f1c7ab5
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,5 @@
+# npmignore overrides .gitignore for yarn pack
+# Only exclude source files, not built files
+entry-asar/**/*.mts
+entry-asar/**/*.ts  
+entry-asar/**/tsconfig.json
diff --git a/entry-asar/esm/tsconfig.json b/entry-asar/esm/tsconfig.json
index 00475c1..adf967d 100644
--- a/entry-asar/esm/tsconfig.json
+++ b/entry-asar/esm/tsconfig.json
@@ -1,9 +1,10 @@
 {
-  "extends": "../../tsconfig.esm.json",
+  "extends": "../../tsconfig.json",
   "compilerOptions": {
     "module": "ESNext",
     "target":"ESNext",
     "outDir": ".",
+    "moduleResolution": "bundler"
   },
   "include": [
     ".",
diff --git a/package.json b/package.json
index e981d9c..5e5a976 100644
--- a/package.json
+++ b/package.json
@@ -19,8 +19,11 @@
   },
   "files": [
     "dist/*",
-    "entry-asar/*",
-    "!entry-asar/**/*.{ts,mts}",
+    "entry-asar/**/*",
+    "!entry-asar/**/has-asar.ts",
+    "!entry-asar/**/no-asar.ts",
+    "!entry-asar/**/has-asar.mts",
+    "!entry-asar/**/no-asar.mts",
     "!entry-asar/**/tsconfig.json",
     "README.md"
   ],
@@ -29,7 +32,7 @@
     "provenance": true
   },
   "scripts": {
-    "build": "tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json && tsc -p entry-asar/esm/tsconfig.json && tsc -p entry-asar/cjs/tsconfig.json",
+    "build": "tsc -p tsconfig.json && tsc -p entry-asar/esm/tsconfig.json && tsc -p entry-asar/cjs/tsconfig.json",
     "build:docs": "npx typedoc",
     "lint": "prettier --check \"{src,entry-asar,test}/**/*.ts\" \"*.ts\"",
     "prettier:write": "prettier --write \"{src,entry-asar,test}/**/*.ts\" \"*.ts\"",
diff --git a/src/index.ts b/src/index.ts
index 02a4fa9..4c0f6b6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -266,13 +266,13 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
         // This needs to be a different file depending on if the app entrypoint is CommonJS or ESM.
         if (pj.type === 'module' || pj.main.endsWith('.mjs')) {
           await fs.promises.cp(
-            path.resolve(import.meta.dirname, '..', '..', 'entry-asar', 'esm', 'no-asar.mjs'),
+            path.resolve(import.meta.dirname, '..', 'entry-asar', 'esm', 'no-asar.mjs'),
             path.resolve(entryAsar, 'index.mjs'),
           );
           pj.main = 'index.mjs';
         } else {
           await fs.promises.cp(
-            path.resolve(import.meta.dirname, '..', '..', 'entry-asar', 'cjs', 'no-asar.js'),
+            path.resolve(import.meta.dirname, '..', 'entry-asar', 'cjs', 'no-asar.js'),
             path.resolve(entryAsar, 'index.js'),
           );
           pj.main = 'index.js';
@@ -363,13 +363,13 @@ export const makeUniversalApp = async (opts: MakeUniversalOpts): Promise<void> =
         // This needs to be a different file depending on if the app entrypoint is CommonJS or ESM.
         if (pj.type === 'module' || pj.main.endsWith('.mjs')) {
           await fs.promises.cp(
-            path.resolve(import.meta.dirname, '..', '..', 'entry-asar', 'esm', 'has-asar.mjs'),
+            path.resolve(import.meta.dirname, '..', 'entry-asar', 'esm', 'has-asar.mjs'),
             path.resolve(entryAsar, 'index.mjs'),
           );
           pj.main = 'index.mjs';
         } else {
           await fs.promises.cp(
-            path.resolve(import.meta.dirname, '..', '..', 'entry-asar', 'cjs', 'has-asar.js'),
+            path.resolve(import.meta.dirname, '..', 'entry-asar', 'cjs', 'has-asar.js'),
             path.resolve(entryAsar, 'index.js'),
           );
           pj.main = 'index.js';