diff --git a/build.sh b/build.sh
index f07e8d7..415a45a 100755
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,7 @@
 set -x -o pipefail
 
 tag=$1
-build=0
+buidl=${build:-0}
 
 docker build -t ${tag}:latest .
 if [[ $build -gt 0 ]]; then