diff --git a/docker/hooks/build b/docker/hooks/build
index 618a914..c1d2143 100755
--- a/docker/hooks/build
+++ b/docker/hooks/build
@@ -7,10 +7,12 @@
   env | sort
 fi
 
+TAG=${CACHE_TAG:-latest}
+
 cd /src/${BUILD_CODE}${BUILD_PATH}
 
 if [ "$DEBUG" == "true" ]; then
-  echo docker build --build-arg REPOSITORY=$REPOSITORY --build-arg REGISTRY=$REGISTRY --build-arg TAG=${TAG:-latest} -t $IMAGE_NAME -f $DOCKERFILE_PATH .
+  echo docker build --build-arg REPOSITORY=$REPOSITORY --build-arg REGISTRY=$REGISTRY --build-arg TAG=$TAG -t $IMAGE_NAME -f $DOCKERFILE_PATH .
 fi
 
-docker build --build-arg REPOSITORY=$REPOSITORY --build-arg REGISTRY=$REGISTRY --build-arg TAG=${TAG:-latest} -t $IMAGE_NAME -f $DOCKERFILE_PATH .
+docker build --build-arg REPOSITORY=$REPOSITORY --build-arg REGISTRY=$REGISTRY --build-arg TAG=$TAG -t $IMAGE_NAME -f $DOCKERFILE_PATH .