anchor.diff:      python3-cairo \
       python3-matplotlib python3-pandas \
       python3-sklearn \
  -    openjdk-8-jre-headless \
  -    r-base && \
  +    openjdk-8-jre-headless && \
  +  apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9 && \
  +  add-apt-repository 'deb [arch=amd64,i386] https://cran.rstudio.com/bin/linux/ubuntu xenial/' && \
  +  add-apt-repository ppa:neovim-ppa/stable && \
  +  apt-get update && \
  +  apt-get install -y neovim r-base && \
  +  mkdir -p /var/run/sshd && \
  +  locale-gen en_US.UTF-8 && \
  +  useradd -ms /usr/bin/zsh runcom && \
  +  echo "runcom:runcom" | chpasswd && \
  +  adduser runcom sudo && \
     apt-get clean
  
positive.code:     tree \
      zlib1g-dev \
      zsh \
      jq
  
  RUN \
    add-apt-repository ppa:neovim-ppa/stable && \
    apt-get update && \
    apt-get install -y neovim
  
  RUN \
    apt-get clean && \
    mkdir -p /var/run/sshd && \
    locale-gen en_US.UTF-8 && \
    useradd -ms /usr/bin/zsh runcom && \
    echo "runcom:runcom" | chpasswd && \
    adduser runcom sudo
  
  RUN \
    apt-get install -y \
      golang \
      ghc \
      pandoc \
  
negative.code: RUN \
    apt-get update && \
    apt-get install -y \
      apt-transport-https \
      build-essential \
      cifs-utils \
      cmake \
  