diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
index 8a17b8dc..bc3d001d 100644
--- a/.github/workflows/docker.yaml
+++ b/.github/workflows/docker.yaml
@@ -61,3 +61,5 @@ jobs:
         tags: ${{ steps.docker_meta.outputs.tags }}
         labels: ${{ steps.docker_meta.outputs.labels }}
         platforms: linux/amd64,linux/arm64
+        build-args: |
+          BUILDKIT_CONTEXT_KEEP_GIT_DIR=true
diff --git a/Dockerfile b/Dockerfile
index ac2a94cc..72642e38 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ SHELL ["/bin/bash", "-x", "-o", "pipefail", "-c"]
 RUN --mount=type=bind,source=.,target=/app/git \
     cd /app/git && \
     READSB_BUILD_DIR=$(mktemp -d) && \
-    cp -r /app/git/* $READSB_BUILD_DIR && \
+    cp -aT /app/git $READSB_BUILD_DIR && \
     cd $READSB_BUILD_DIR && \
     [[ $(uname -m) == x86_64 ]] && MARCH=" -march=nehalem" || MARCH="" && \
     make -j$(nproc) RTLSDR=yes OPTIMIZE="-O2 $MARCH" && \