diff --git a/dev/buildout.cfg b/dev/buildout.cfg
index ceff7d2..fc7c10c 100644
--- a/dev/buildout.cfg
+++ b/dev/buildout.cfg
@@ -7,6 +7,7 @@ extends =
     http://good-py.appspot.com/release/plone.app.discussion/1.0a1
 versions = versions
 sources = sources
+sources-dir = src
 
 auto-checkout =
     plone.app.discussion