update repo names
diff --git a/aptly/server/mirror/ubuntu/xenial/ceph.yml b/aptly/server/mirror/ubuntu/xenial/ceph.yml
index 7e9422e..efb1703 100644
--- a/aptly/server/mirror/ubuntu/xenial/ceph.yml
+++ b/aptly/server/mirror/ubuntu/xenial/ceph.yml
@@ -12,4 +12,4 @@
           publisher:
             component: ceph
             distributions:
-              - xenial/nightly
+              - ubuntu-xenial/nightly