--- a/setup.py	Wed May 20 12:41:37 2015 +0200
+++ b/setup.py	Wed Jun 17 10:01:29 2015 +0200
@@ -80,6 +80,7 @@
           'zope.container',
           'zope.datetime',
           'zope.interface',
+          'zope.location',
           'zope.schema',
           'zope.site',
           'zope.traversing'