add builder optinal env distros

diff --git a/builder/builder b/builder/builder
index 7bf788cf6b3a76b12e5ccdbd97cff10ae166c406..8ed894665e0820340b3c115ed958614a3fe7c527 100755 (executable)
--- a/builder/builder
+++ b/builder/builder
@@ -34,7 +34,7 @@ run_builder_container()
 
 main()
 {
-       local distros="debian:oldstable-slim debian:stable-slim debian:testing-slim ubuntu:latest ubuntu:rolling"
+       local distros=${DISTROS:="debian:oldstable-slim debian:stable-slim debian:testing-slim ubuntu:latest ubuntu:rolling"}
        mkdir -p build
        cp builder/run build/