Index: Lib/site.py
===================================================================
--- Lib/site.py	(revision 79298)
+++ Lib/site.py	(working copy)
@@ -118,7 +118,7 @@
     s = "build/lib.%s-%.3s" % (get_platform(), sys.version)
     if hasattr(sys, 'gettotalrefcount'):
         s += '-pydebug'
-    s = os.path.join(os.path.dirname(sys.path[-1]), s)
+    s = os.path.join(os.path.dirname(sys.path.pop()), s)
     sys.path.append(s)