update repo names
diff --git a/aptly/server/mirror/ubuntu/xenial/grafana.yml b/aptly/server/mirror/ubuntu/xenial/grafana.yml
index 58702d3..2db0586 100644
--- a/aptly/server/mirror/ubuntu/xenial/grafana.yml
+++ b/aptly/server/mirror/ubuntu/xenial/grafana.yml
@@ -12,4 +12,4 @@
           publisher:
             component: grafana
             distributions:
-              - xenial/nightly
+              - ubuntu-xenial/nightly