anchor.diff:  WORKDIR /home/opam
   RUN opam init
   
  +# CUSTOMIZE: add additional OPAM packages you need to install
   RUN opam install batteries omake
   
   WORKDIR /home/opam/src
  
positive.code: 
  ENV DEBIAN_FRONTEND noninteractive
  
  # OPTIONAL: Use AWS mirrors. Comment out next line if you building outside of AWS east
  RUN sed 's@archive.ubuntu.com@us-east-1.ec2.archive.ubuntu.com@' -i /etc/apt/sources.list
  RUN apt-get -y update -qq
  RUN apt-get upgrade -y
  
negative.code: #See https://opam.ocaml.org/doc/Install.html#Ubuntu
  RUN echo "yes" | add-apt-repository ppa:avsm/ppa
  RUN apt-get -y update -qq
  # CUSTOMIZE: add additonal packages you may need. 
  # For example OPAM ocamlnet package requires: zlib1g zlib1g-dev
  RUN apt-get -y install -qq ocaml ocaml-native-compilers camlp4-extra aspcud opam m4 darcs mercurial
  
  #Install application
  