anchor.diff:  # 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
  
positive.code: RUN DEBIAN_FRONTEND=noninteractive apt-get install -y \
    android-tools-adb \
    android-tools-fastboot \
    autoconf \
    apt-file \
    bc \
    ccache \
    chrpath \
  
negative.code:   openjdk-7-jdk \
    openssh-server \
    texinfo \
    xmlstarlet \
    zip
  
  USER root
  