diff --git a/package-lock.json b/package-lock.json
index 4783822..2d6b9b7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@checkdigit/typescript-config",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@checkdigit/typescript-config",
-      "version": "5.0.0",
+      "version": "5.0.1",
       "license": "MIT",
       "bin": {
         "builder": "bin/builder.mjs"
diff --git a/package.json b/package.json
index d05703f..ac00a41 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@checkdigit/typescript-config",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "description": "Check Digit standard Typescript configuration",
   "prettier": "@checkdigit/prettier-config",
   "engines": {
diff --git a/src/builder/builder.mts b/src/builder/builder.mts
index 958fa8e..bd6961f 100644
--- a/src/builder/builder.mts
+++ b/src/builder/builder.mts
@@ -200,7 +200,7 @@ export default async function ({
     format: type === 'module' ? 'esm' : 'cjs',
     sourcesContent: false,
     banner:
-      type === 'module' && outFile !== undefined
+      type === 'module'
         ? {
             js: 'import { createRequire as __createRequire } from "node:module";\nconst require = __createRequire(import.meta.url);',
           }
diff --git a/src/builder/builder.spec.mts b/src/builder/builder.spec.mts
index 0d4d151..6c359cc 100644
--- a/src/builder/builder.spec.mts
+++ b/src/builder/builder.spec.mts
@@ -155,7 +155,14 @@ describe('test builder', () => {
     await write(inDir, singleModule);
     assert.deepEqual(await builder({ type: 'module', inDir, outDir }), []);
     assert.deepEqual(await read(outDir), {
-      'index.mjs': 'var hello = "world";\nexport {\n  hello\n};\n',
+      'index.mjs':
+        'import { createRequire as __createRequire } from "node:module";\n' +
+        'const require = __createRequire(import.meta.url);\n' +
+        '\n' +
+        'var hello = "world";\n' +
+        'export {\n' +
+        '  hello\n' +
+        '};\n',
     });
 
     // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
@@ -170,7 +177,10 @@ describe('test builder', () => {
     await write(inDir, singleModule);
     assert.deepEqual(await builder({ type: 'module', inDir, outDir, minify: true }), []);
     assert.deepEqual(await read(outDir), {
-      'index.mjs': 'var o="world";export{o as hello};\n',
+      'index.mjs':
+        'import { createRequire as __createRequire } from "node:module";\n' +
+        'const require = __createRequire(import.meta.url);\n' +
+        'var o="world";export{o as hello};\n',
     });
 
     // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
@@ -186,6 +196,9 @@ describe('test builder', () => {
     assert.deepEqual(await builder({ type: 'module', inDir, outDir }), []);
     assert.deepEqual(await read(outDir), {
       'index.mjs':
+        'import { createRequire as __createRequire } from "node:module";\n' +
+        'const require = __createRequire(import.meta.url);\n' +
+        '\n' +
         'function src_default() {\n' +
         '  return "hello world";\n' +
         '}\n' +
@@ -250,12 +263,22 @@ describe('test builder', () => {
     assert.deepEqual(await builder({ type: 'module', inDir, outDir }), []);
     assert.deepEqual(await read(outDir), {
       'index.mjs':
+        'import { createRequire as __createRequire } from "node:module";\n' +
+        'const require = __createRequire(import.meta.url);\n' +
+        '\n' +
         'import { hello } from "./thing.mjs";\n' +
         'var src_default = hello + "world";\n' +
         'export {\n' +
         '  src_default as default\n' +
         '};\n',
-      'thing.mjs': 'var hello = "world";\nexport {\n  hello\n};\n',
+      'thing.mjs':
+        'import { createRequire as __createRequire } from "node:module";\n' +
+        'const require = __createRequire(import.meta.url);\n' +
+        '\n' +
+        'var hello = "world";\n' +
+        'export {\n' +
+        '  hello\n' +
+        '};\n',
     });
     // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
     const output = await import(path.join(outDir, 'index.mjs'));