diff --git a/lib/fp/build-modules.js b/lib/fp/build-modules.js
index 935a77cbf..012a686a8 100644
--- a/lib/fp/build-modules.js
+++ b/lib/fp/build-modules.js
@@ -4,7 +4,6 @@ var _ = require('lodash'),
     async = require('async'),
     fs = require('fs-extra'),
     glob = require('glob'),
-    Module = require('module'),
     path = require('path');
 
 var mapping = require('../../fp/_mapping');
diff --git a/lib/main/build-modules.js b/lib/main/build-modules.js
new file mode 100644
index 000000000..a7f518309
--- /dev/null
+++ b/lib/main/build-modules.js
@@ -0,0 +1,23 @@
+'use strict';
+
+var _ = require('lodash'),
+    fs = require('fs-extra'),
+    path = require('path');
+
+var basePath = path.join(__dirname, '..', '..'),
+    distPath = path.join(basePath, 'dist'),
+    corePath = path.join(distPath, 'lodash.core.js');
+
+/*----------------------------------------------------------------------------*/
+
+function onComplete(error) {
+  if (error) {
+    throw error;
+  }
+}
+
+function build(target) {
+  fs.copy(corePath, path.join(target, 'core.js'), onComplete);
+}
+
+build(_.last(process.argv));
diff --git a/package.json b/package.json
index 0c13a2d96..ae699469a 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "build:fp": "node lib/fp/build-dist.js",
     "build:fp-modules": "node lib/fp/build-modules.js",
     "build:main": "node lib/main/build-dist.js",
+    "build:main-modules": "node lib/main/build-modules.js",
     "doc": "node lib/doc/build github",
     "doc:site": "node lib/doc/build site",
     "style": "npm run style:main & npm run style:fp & npm run style:perf & npm run style:test",