diff --git a/index.js b/index.js
index 2118e8e..36417ca 100644
--- a/index.js
+++ b/index.js
@@ -1,80 +1,79 @@
 'use strict'
 
-var semver = require('semver')
+const semver = require('semver')
 
-module.exports = function ({
-  version = process.version,
-  experimental = false
-} = {}) {
-  var coreModules = [
-    'assert',
-    'buffer',
-    'child_process',
-    'cluster',
-    'console',
-    'constants',
-    'crypto',
-    'dgram',
-    'dns',
-    'domain',
-    'events',
-    'fs',
-    'http',
-    'https',
-    'module',
-    'net',
-    'os',
-    'path',
-    'punycode',
-    'querystring',
-    'readline',
-    'repl',
-    'stream',
-    'string_decoder',
-    'sys',
-    'timers',
-    'tls',
-    'tty',
-    'url',
-    'util',
-    'vm',
-    'zlib'
-  ]
+const coreModules = [
+  'assert',
+  'buffer',
+  'child_process',
+  'cluster',
+  'console',
+  'constants',
+  'crypto',
+  'dgram',
+  'dns',
+  'domain',
+  'events',
+  'fs',
+  'http',
+  'https',
+  'module',
+  'net',
+  'os',
+  'path',
+  'punycode',
+  'querystring',
+  'readline',
+  'repl',
+  'stream',
+  'string_decoder',
+  'sys',
+  'timers',
+  'tls',
+  'tty',
+  'url',
+  'util',
+  'vm',
+  'zlib'
+]
 
-  const versionLockedModules = {
-    freelist: '<6.0.0',
-    v8: '>=1.0.0',
-    process: '>=1.1.0',
-    inspector: '>=8.0.0',
-    async_hooks: '>=8.1.0',
-    http2: '>=8.4.0',
-    perf_hooks: '>=8.5.0',
-    trace_events: '>=10.0.0',
-    worker_threads: '>=12.0.0'
-  }
+const versionLockedModules = {
+  freelist: '<6.0.0',
+  v8: '>=1.0.0',
+  process: '>=1.1.0',
+  inspector: '>=8.0.0',
+  async_hooks: '>=8.1.0',
+  http2: '>=8.4.0',
+  perf_hooks: '>=8.5.0',
+  trace_events: '>=10.0.0',
+  worker_threads: '>=12.0.0'
+}
+
+const experimentalModules = {
+  worker_threads: '>=10.5.0',
+  wasi: '>=12.16.0',
+  diagnostics_channel: '^14.17.0 || >=15.1.0'
+}
+
+module.exports = ({ version = process.version, experimental = false } = {}) => {
+  const builtins = [...coreModules]
 
   for (const [name, semverRange] of Object.entries(versionLockedModules)) {
     if (version === '*' || semver.satisfies(version, semverRange)) {
-      coreModules.push(name)
+      builtins.push(name)
     }
   }
 
-  const experimentalModules = {
-    worker_threads: '>=10.5.0',
-    wasi: '>=12.16.0',
-    diagnostics_channel: '^14.17.0 || >=15.1.0'
-  }
-
   if (experimental) {
     for (const [name, semverRange] of Object.entries(experimentalModules)) {
       if (
-        !coreModules.includes(name) &&
+        !builtins.includes(name) &&
         (version === '*' || semver.satisfies(version, semverRange))
       ) {
-        coreModules.push(name)
+        builtins.push(name)
       }
     }
   }
 
-  return coreModules
+  return builtins
 }