anchor.diff:        zlib1g-dev \
         zsh \
       > /dev/null && apt-get clean && rm -rf /var/lib/apt/lists/*
  +RUN locale-gen en_US.UTF-8
   
   RUN useradd -s /bin/zsh tester
   ADD . /home/tester/.dotfiles
  
positive.code: FROM ubuntu:16.10
  MAINTAINER Michael Mior <michael.mior@gmail.com>
  
  RUN locale-gen en_US.UTF-8
  ENV DEBIAN_FRONTEND=noninteractive
  RUN apt-get -qq update && \
      apt-get install -qq -o=Dpkg::Use-Pty=0 \
  
negative.code:       libtool \
        libyaml-dev \
        libxml2 \
        locales \
        ncurses-dev \
        opam \
        openssl \
  