--- a/mercurial/demandimport.py	Sun Dec 21 15:06:54 2014 -0500
+++ b/mercurial/demandimport.py	Mon Dec 22 17:27:31 2014 -0500
@@ -164,6 +164,8 @@
     '_ssl', # conditional imports in the stdlib, issue1964
     'rfc822',
     'mimetools',
+    # setuptools 8 expects this module to explode early when not on windows
+    'distutils.msvc9compiler'
     ]
 
 def isenabled():