diff --git a/README.md b/README.md
index 6b5898d..7263011 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ bind-mount `/etc/vpp/bootstrap.vpp`.
 ```bash
 IMG=git.ipng.ch/ipng/vpp-containerlab
 TAG=latest
-docker build --no-cache -f docker/Dockerfile.bookworm -t $IMG docker/
+docker build --no-cache --build-arg REPO=release -f docker/Dockerfile.bookworm -t $IMG docker/
 docker image tag $IMG $IMG:$TAG
 docker push $IMG
 docker push $IMG:$TAG