diff --git a/.docker/.build_dir/none.txt b/.docker/.build_dir/none.txt
new file mode 100644
index 0000000..e69de29
diff --git a/Dockerfile b/Dockerfile
index b67c953..5cb35ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,6 @@ FROM smartentry/alpine:3.6-0.4.0
 MAINTAINER Kagurazaka Shira <nico@ni-co.moe>
 
 ADD .docker $ASSETS_DIR
-ADD .build_dir $BUILD_DIR
+ADD $ASSETS_DIR/.build_dir $BUILD_DIR
 
 RUN smartentry.sh build