update preffix, in order to avoid pkg conflicts on pool
diff --git a/aptly/server/mirror/ubuntu/trusty/haproxy.yml b/aptly/server/mirror/ubuntu/trusty/haproxy.yml
index 14ab72d..30f43c1 100644
--- a/aptly/server/mirror/ubuntu/trusty/haproxy.yml
+++ b/aptly/server/mirror/ubuntu/trusty/haproxy.yml
@@ -12,4 +12,4 @@
           publisher:
             component: haproxy
             distributions:
-              - nightly/trusty
+              - trusty-haproxy