anchor.diff:  RUN add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"
   RUN apt-get update
   RUN apt-get -y install --no-install-recommends docker-ce="${DOCKER_VERSION}" docker-ce-cli="${DOCKER_VERSION}" containerd.io="${CONTAINERD_VERSION}"
  -
  -# Update python3 to point to python3.7
  -RUN ln -sf /usr/bin/python3.7 /usr/bin/python3
   
   # Clean up stuff we don't need in the final image
   RUN rm -rf /var/lib/apt/lists/*
  
positive.code:     curl \
      libc-dev \
      pkg-config \
      python3.7 \
      python3-distutils
  
  # installing pip in this manner to get pip3.7 and not pip3.6
  RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && python3.7 get-pip.py
  
  ADD https://storage.googleapis.com/istio-build-deps/mako-0.1-cp37-cp37m-linux_x86_64.whl /tmp
  # Install Python stuff
  # hadolint ignore=DL3013
  RUN pip3 install --no-binary :all: autopep8==${AUTOPEP8_VERSION}
  RUN pip3 install yamllint==${YAMLLINT_VERSION}
  RUN pip3 install requests==${REQUESTS_VERSION}
  RUN pip3 install ruamel.yaml==${RUAMELYAML_VERSION}
  RUN pip3 install protobuf==${PYTHON_PROTOBUF_VERSION}
  RUN pip3 install PyYAML==${PYYAML_VERSION}
  # hadolint ignore=DL3013
  RUN pip3 install /tmp/mako-0.1-cp37-cp37m-linux_x86_64.whl
  
  #############
  # Base OS
  
negative.code:     make \
      pkg-config \
      python3 \
      python3-setuptools \
      daemon \
      wget \
  