anchor.diff:  
   # Install browsers
   RUN apt-get install -y \
  -    firefox-esr        \
       google-chrome-stable
   
   # Install and config gcloud
  
positive.code:     mtools             \
      nasm               \
      net-tools          \
      openjdk-8-jdk      \
      pkg-config         \
      python             \
      python-m2crypto    \
      python2.7-dev      \
      tcpdump            \
      texinfo            \
  
negative.code: FROM ubuntu:bionic@sha256:512274f1739676880585e70eea6a883db7b6d92841b02647b6c92b478356572c
  
  ENV DEPOT_TOOLS_PATH $HOME/depot_tools
  ENV BUILDROOT_PATH $HOME/buildroot
  ENV ENGINE_PATH $HOME/engine
  ENV PATH $PATH:$DEPOT_TOOLS_PATH
  ARG DEBIAN_FRONTEND=noninteractive
  
  # Notes:
  # - libx11-dev is used by Flutter for desktop linux (see also install-build-deps-linux-desktop.sh)
  