diff -r 525320df8afb -r 87df1d37c88e Lib/site.py
--- a/Lib/site.py	Thu Mar 17 20:20:30 2011 +0200
+++ b/Lib/site.py	Thu Mar 17 15:22:03 2011 -0400
@@ -526,7 +526,8 @@
     if ENABLE_USER_SITE:
         execusercustomize()
 
-main()
+if not sys.flags.no_site:
+    main()
 
 def _script():
     help = """\