message: Dockerfile: do not perform cleanup in a separate RUN statement
  Cleanup must be performed in the same statement, otherwise the build
  files are still stored in the upper layer and no space is reclaimed.
diff: @@ -101,12 +101,11 @@ RUN ln -s /usr/local/cuda/lib64/stubs/libcuda.so /usr/local/cuda/lib64/stubs/lib
  --jobs=${TF_AVAILABLE_CPUS} \
  tensorflow/tools/pip_package:build_pip_package && \
  mkdir /pip_pkg && \
  - bazel-bin/tensorflow/tools/pip_package/build_pip_package /pip_pkg
  -
  -# Clean up pip wheel and Bazel cache when done.
  -RUN pip --no-cache-dir install --upgrade /pip_pkg/tensorflow-*.whl && \
  + bazel-bin/tensorflow/tools/pip_package/build_pip_package /pip_pkg && \
  + pip --no-cache-dir install --upgrade /pip_pkg/tensorflow-*.whl && \
  rm -rf /pip_pkg && \
  rm -rf /root/.cache
  +# Clean up pip wheel and Bazel cache when done.
  WORKDIR /root
  