anchor.diff:  # Confd
   RUN curl -L https://github.com/kelseyhightower/confd/releases/download/v0.7.1/confd-0.7.1-linux-amd64 -o confd && \
       chmod +x confd
  -
  -# Node-specific apt-get.
  -RUN apt-get update && \
  -    apt-get install -qy \
  -        bird \
  -        bird6 \
  -        build-essential && \
  -    apt-get clean && \
  -    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
   # Powerstrip
   RUN curl -L https://github.com/ClusterHQ/powerstrip/archive/v0.0.1.tar.gz \
  
positive.code:         python-docopt \
          python-pip \
          python-pyasn1 \
          python-gevent && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
  
negative.code: #    echo "Pin: origin binaries.projectcalico.org" >> /etc/apt/preferences && \
  #    echo "Pin-Priority: 1001" >> /etc/apt/preferences
  
  RUN apt-get update && \
      apt-get install -qy \
  #        calico-felix \
          bird \
          bird6 \
          build-essential \
          ipset \
          iptables \
          libffi-dev \
  