diff --git a/IPython/frontend/cocoa/plugin/setup.py b/IPython/frontend/cocoa/plugin/setup.py
index 6811e11..8393085 100644
--- a/IPython/frontend/cocoa/plugin/setup.py
+++ b/IPython/frontend/cocoa/plugin/setup.py
@@ -29,6 +29,7 @@ setup(
     setup_requires=['py2app'],
 	options=dict(py2app=dict(
 		plist=infoPlist,
-		excludes=['IPython','twisted']
+		site_packages=True,
+		excludes=['IPython','twisted','PyObjCTools']
 	)),
 )
\ No newline at end of file