diff -ruN a/pip/_vendor/requests/certs.py b/pip/_vendor/requests/certs.py
--- a/pip/_vendor/requests/certs.py	2014-05-16 20:03:31.000000000 +0200
+++ b/pip/_vendor/requests/certs.py	2014-07-03 09:54:46.751966582 +0200
@@ -19,8 +19,7 @@
 except ImportError:
     def where():
         """Return the preferred certificate bundle."""
-        # vendored bundle inside Requests
-        return os.path.join(os.path.dirname(__file__), 'cacert.pem')
+        return "/etc/ssl/ca-bundle.pem"
 
 if __name__ == '__main__':
     print(where())