diff --git a/build b/build
index fb4f2b3..7175d33 100755
--- a/build
+++ b/build
@@ -39,7 +39,9 @@ do
 
     # pull the parent image from docker hub, if it doesn't already exist locally.
     LOCAL_EXISTS=$(docker images --format "{{.Repository}}:{{.Tag}}" | grep -x ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG})
-    if [[ $FORCE_LOCAL == 1 && $LOCAL_EXISTS != "" ]]; then
+    echo "LOCAL_EXISTS: $LOCAL_EXISTS"
+    echo "USE_LOCAL: $USE_LOCAL"
+    if [[ $USE_LOCAL == 1 && $LOCAL_EXISTS != "" ]]; then
         echo "Using local image ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG}..."
     else
         echo "Pulling upstream image ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG}..."