anchor.diff:  
   #install rvm
   RUN curl -sSL https://rvm.io/mpapis.asc | gpg --import && \
  -    curl -sSL https://get.rvm.io | sudo bash -s stable --ruby=$RUBY_VERSION
  +    curl -sSL https://get.rvm.io | bash -s stable --ruby=$RUBY_VERSION
   ENV PATH=/usr/local/rvm/bin:$PATH
   
   #install mix
   RUN wget https://packages.erlang-solutions.com/erlang-solutions_${MIX_VERSION}_all.deb && \
  -    sudo dpkg -i erlang-solutions_${MIX_VERSION}_all.deb && \
  -    sudo apt-get update && \
  -    sudo apt-get install -y esl-erlang && \
  -    sudo apt-get install -y elixir
  +    dpkg -i erlang-solutions_${MIX_VERSION}_all.deb && \
  +    apt-get update && \
  +    apt-get install -y esl-erlang && \
  +    apt-get install -y elixir
   
   # install bundler
   RUN bash -lc "gem update --system && gem install bundler"
  
positive.code:   go get github.com/golang/dep/cmd/dep
  
  # Fix the locale
  RUN locale-gen en_US.UTF-8
  ENV LANG=en_US.UTF-8
  ENV LANGUAGE=en_US:en
  
negative.code: ENV RUBY_VERSION 2.5.1
  ENV MIX_VERSION 1.0
  
  # programs needed for building
  RUN apt-get update && apt-get install -y \
    curl \
    git-core \
    build-essential \
    wget \
    unzip
  
  # nodejs seems to be required for the one of the gems
  RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
      apt-get -y install nodejs
  
  # install yarn
  RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    apt-get update && \
    apt-get install yarn
  
  