anchor.diff:          sphinxcontrib-toc \
       && apt-get -yqq clean \
       && rm -rf /var/lib/apt/lists/*
  -
  
positive.code:     python-setuptools \
      unzip \
      zip \
      zlib1g-dev
  
  ADD python/setup_requirements.txt /tmp/deps/
  RUN pip install -U -r /tmp/deps/setup_requirements.txt
  
negative.code:     && rm -rf /var/lib/apt/lists/* \
      && rm -rf /protobuf /protoc-gen-doc
  
  RUN apt-get -yqq update \
      && apt-get -yqq install --no-install-recommends \
          doxygen \
  