update preffix, in order to avoid pkg conflicts on pool
diff --git a/aptly/server/mirror/ubuntu/trusty/ceph.yml b/aptly/server/mirror/ubuntu/trusty/ceph.yml
index 67ebfda..b2bae2d 100644
--- a/aptly/server/mirror/ubuntu/trusty/ceph.yml
+++ b/aptly/server/mirror/ubuntu/trusty/ceph.yml
@@ -12,4 +12,4 @@
           publisher:
             component: ceph
             distributions:
-              - nightly/trusty
+              - trusty/nightly