diff --git a/cli.js b/cli.js
new file mode 100755
index 0000000..77aaaa8
--- /dev/null
+++ b/cli.js
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('./index')()
diff --git a/index.js b/index.js
old mode 100755
new mode 100644
index f2bb579..3c2d505
--- a/index.js
+++ b/index.js
@@ -1,4 +1,3 @@
-#!/usr/bin/env node
 var fs = require('fs')
 var path = require('path')
 var spawn = require('child_process').spawn
@@ -212,4 +211,4 @@ function postinstallBuild () {
   })
 }
 
-postinstallBuild()
+module.exports = postinstallBuild
diff --git a/package.json b/package.json
index 1b9765e..d284e48 100644
--- a/package.json
+++ b/package.json
@@ -11,10 +11,11 @@
   },
   "main": "index.js",
   "bin": {
-    "postinstall-build": "index.js"
+    "postinstall-build": "cli.js"
   },
   "files": [
-    "index.js"
+    "index.js",
+    "cli.js"
   ],
   "scripts": {
     "build": "npm run build:docs",