diff --git a/Dockerfile b/Dockerfile
index 2bc5296c7c8535b10793e869f23eb48d25b531ff..4c84381530f605c297d46bddb7c467e79cc15925 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,9 @@
 ARG DOCKER_REGISTRY=registry.cyberbrain.pw
-FROM $DOCKER_REGISTRY/tools/docker/git/main:latest
+
+ARG GIT_IMAGE=tools/docker/git/main
+ARG GIT_TAG=latest
+
+FROM $DOCKER_REGISTRY/$GIT_IMAGE:$GIT_TAG AS runtime
 
 WORKDIR /tmp/openwrt
 
@@ -14,3 +18,5 @@ RUN set -ex && \
 
 COPY entrypoint.sh /entrypoint.sh
 COPY sync.sh /sync.sh
+
+FROM runtime AS release