diff --git a/ci/kas-container-shell-helper.sh b/ci/kas-container-shell-helper.sh
index 39e4be63a..fb825d02f 100755
--- a/ci/kas-container-shell-helper.sh
+++ b/ci/kas-container-shell-helper.sh
@@ -17,4 +17,4 @@ SCRIPT=${SCRIPT#$TOPDIR/}
 # on ci the kas-container is not on the default path
 KAS_CONTAINER=${KAS_CONTAINER:-$(which kas-container)}
 
-exec $KAS_CONTAINER shell $TOPDIR/ci/base.yml --command "/repo/$SCRIPT /repo /work"
+exec $KAS_CONTAINER shell ${KAS_YAMLS:-$TOPDIR/ci/base.yml} --command "/repo/$SCRIPT /repo /work"