diff --git a/debian-here.sh b/debian-here.sh
index 5a56a30..31f4c03 100755
--- a/debian-here.sh
+++ b/debian-here.sh
@@ -12,10 +12,11 @@ script_dir="$(dirname "$(readlink -f "$0")")"
 
 
 run() {
-    if [[ ! -z ${BUILD:-} ]];then
+    if [[ ! -z "${BUILD:-}" ]];then
         pushd "$script_dir"
         docker build -t debian-here .
         popd
+        exit
     fi
 
     mount_point="/mnt/$(basename "$here")"