anchor.diff:  # tools
   RUN apt-get install -y dnsutils bash-completion xsltproc \
       build-essential fakeroot tmux duplicity lftp htop apt-file \
  -    parallel nano strace ltrace flex jq ack-grep gdb valgrind locate tree time
  +    parallel nano strace ltrace flex jq ack-grep gdb valgrind locate tree time \
  +    zip
   
   # Version control
   RUN apt-get install -y git-all tig subversion subversion-tools cvs \
  
positive.code: # libraries and headers
  RUN apt-get install -y libcairo2-dev libjpeg62-dev libgif-dev libpq-dev \
      libboost-all-dev libzmq-dev libwww-curl-perl libbz2-dev dpkg-dev \
      ruby1.9.1-dev dialog python-gtk2 libpango1.0 libpango1.0-dev
  
  # Deployment
  RUN wget -qO- https://toolbelt.heroku.com/install-ubuntu.sh | sh -e && \
  
negative.code: # Python
  RUN apt-get install -y python3 python3-dev python3-setuptools ipython3 \
      python3-scipy python3-pip python python-dev python-pip python-setuptools ipython \
      python-scipy python-matplotlib python-virtualenv virtualenvwrapper pylint
  
  # Julia
  RUN apt-get install -y julia julia-doc
  