anchor.diff:  
   # Switch to user "nvm" from now
   USER nvm
  -
  -# Shellcheck
  -RUN cabal update
  -RUN cabal install ShellCheck
  -RUN ~/.cabal/bin/shellcheck --version
  -RUN echo 'export PATH="~/.cabal/bin/:${PATH}"'                                >> $HOME/.bashrc
   
   # nvm
   COPY . /home/nvm/.nvm/
  
positive.code: RUN git --version
  RUN curl --version
  RUN wget --version
  RUN cabal --version
  
  # Add user "nvm" as non-root user
  RUN useradd -ms /bin/bash nvm
  
negative.code: 
  # Prevent dialog during apt install
  ENV DEBIAN_FRONTEND noninteractive
  
  # ShellCheck version
  ENV SHELLCHECK_VERSION=0.4.7
  
  # Pick a Ubuntu apt mirror site for better speed
  # ref: https://launchpad.net/ubuntu/+archivemirrors
  