anchor.diff:  ARG cpu_base_image="ubuntu:18.04"
   ARG base_image=$cpu_base_image
   ARG tensorflow_pip="tf-nightly"
  -ARG python_version="/usr/bin/python3.6"
  +ARG python_version="python3.7"
   ARG APT_COMMAND="apt-get -o Acquire::Retries=3 -y"
   
   # Pick up some TF dependencies
  
positive.code: #
  # Test that everything worked:
  #
  #
  # export PYTHON_BIN_PATH=/usr/bin/python3.7
  # $PYTHON_BIN_PATH ./configure.py
  # bazel test -c opt --test_output=streamed //reverb:tf_client_test
  
  ARG cpu_base_image="ubuntu:18.04"
  
negative.code:         libzmq3-dev \
          lsof \
          pkg-config \
          python3.7-dev \
          python3.8-dev \
          python3.8-distutils \
  