anchor.diff:  RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0x219BD9C9 && \
       apt-add-repository 'deb http://repos.azulsystems.com/ubuntu stable main' && \
       apt-get -qqy update && \
  -    apt-get -qqy install zulu-8
  +    apt-get -qqy install zulu-8 && \
  +    rm -rf /var/lib/apt/lists/*
   USER bazel
   
   ###############################################################################
  
positive.code: RUN export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)" && \
      echo "deb http://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list && \
      curl -L https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - && \
      apt-get -qqy update && apt-get -qqy install google-cloud-sdk && \
      rm -rf /var/lib/apt/lists/*
  
  
  ### Install Node.js and packages required by Gerrit.
  ### (see https://gerrit.googlesource.com/gerrit/+show/master/polygerrit-ui/README.md)
  RUN curl -L https://deb.nodesource.com/setup_8.x | bash - && \
      apt-get -qqy install nodejs && \
      npm install -g typescript fried-twinkie@0.0.15
  
  ### Install Python (required our own bazelci.py script).
  RUN export PYTHON_VERSION="3.6.8" && \
  
negative.code: RUN export CLOUD_SDK_REPO="cloud-sdk-$(lsb_release -c -s)" && \
      echo "deb http://packages.cloud.google.com/apt $CLOUD_SDK_REPO main" | tee -a /etc/apt/sources.list.d/google-cloud-sdk.list && \
      curl -L https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - && \
      apt-get -qqy update && \
      apt-get -qqy install google-cloud-sdk && \
      rm -rf /var/lib/apt/lists/*
  
  ### Install Node.js and packages required by Gerrit.
  ### (see https://gerrit.googlesource.com/gerrit/+show/master/polygerrit-ui/README.md)
  RUN curl -L https://deb.nodesource.com/setup_8.x | bash - && \
      apt-get -qqy update && \
      apt-get -qqy install nodejs && \
      npm install -g typescript fried-twinkie@0.0.15 && \
      rm -rf /var/lib/apt/lists/*
  
  ### Install Python (required by our own bazelci.py script).
  RUN export PYTHON_VERSION="3.6.8" && \
  