diff --git a/mirror/syncubuntu.sh b/mirror/syncubuntu.sh
index 23a713f..2627013 100755
--- a/mirror/syncubuntu.sh
+++ b/mirror/syncubuntu.sh
@@ -20,4 +20,6 @@ debmirror \
 	--method=http \
 	$DST/ubuntu
 
+echo "http://172.17.0.1/ubuntu/" > $DST/ubuntu/mirrors.txt
+
 chmod -R a+rX $DST/ubuntu