anchor.diff:  RUN DEBIAN_FRONTEND=noninteractive apt-get install -y \
     android-tools-adb \
     android-tools-fastboot \
  +  apt-file \
     autoconf \
  -  apt-file \
     bc \
     ccache \
     chrpath \
  
positive.code:   openjdk-7-jdk \
    openssh-server \
    texinfo \
    zip
  
  USER root
  
negative.code: # Install node v6.9.1
  RUN wget https://nodejs.org/dist/v6.9.1/node-v6.9.1-linux-x64.tar.gz
  RUN tar -xv -C /usr/local --strip-components 1 -f node-v6.9.1-linux-x64.tar.gz
  RUN rm node-v6.9.1-linux-x64.tar.gz
  
  USER silk
  RUN ccache -M 10GB
  