anchor.diff:  WORKDIR /home/ghc
   USER ghc
   
  -ENV PATH /opt/ghc/8.2.2/bin:/opt/cabal/2.0/bin:/php/arcanist/bin:$PATH 
  +ENV PATH /opt/ghc/8.2.2/bin:/opt/cabal/2.2/bin:/php/arcanist/bin:$PATH
   
   # Build dependencies for nofib-analyse
  -RUN cabal update && cabal install html regex-compat 
  +RUN cabal update && cabal install html regex-compat
   
  
positive.code:   xsltproc docbook-xsl \
    python-sphinx \
    texinfo \
    
    # Needed for testing current HEAD
    python3 \
    
    # Needed for running nofib
    time \
  
  
negative.code: RUN apt-get update && apt-get install -y \
    # Needed for adding the PPA key
    gnupg \
    gpgv
  
  ## add ppa for ubuntu trusty haskell packages
  # from darinmorrison/haskell
  # from http://downloads.haskell.org/debian/
  RUN  apt-key adv --keyserver hkp://keyserver.ubuntu.com:80  --recv-keys BA3CBA3FFE22B574 \
    && echo 'deb     http://downloads.haskell.org/debian stretch main' >> /etc/apt/sources.list.d/haskell.list
  
  RUN apt-get update && apt-get install -y \
  
  