--- a/buildout.cfg	Wed May 20 12:41:37 2015 +0200
+++ b/buildout.cfg	Wed Jun 17 10:01:29 2015 +0200
@@ -49,6 +49,7 @@
     zope.container
     zope.datetime
     zope.interface
+    zope.location
     zope.schema
     zope.site
     zope.traversing