anchor.diff:  # containerd v1.4 for integration tests
   FROM containerd-base as containerd-alt-14
   ARG CONTAINERD_ALT_VERSION_14
  -ARG GO111MODULE=off
   RUN --mount=from=containerd-src,src=/usr/src/containerd,readwrite --mount=target=/root/.cache,type=cache \
     git fetch origin \
     && git checkout -q "$CONTAINERD_ALT_VERSION_14" \
  
positive.code: VOLUME /home/user/.local/share/buildkit
  ENTRYPOINT ["rootlesskit", "buildkitd"]
  
  
  FROM buildkit-${BUILDKIT_TARGET}
  
  
  
negative.code: 
  # build buildkitd binary
  FROM buildkit-base AS buildkitd
  # BUILDKITD_TAGS defines additional Go build tags for compiling buildkitd
  ARG BUILDKITD_TAGS
  ARG TARGETPLATFORM
  RUN --mount=target=. --mount=target=/root/.cache,type=cache \
  