anchor.diff:  
     ## install minimal set of haskell packages
     # from darinmorrison/haskell
  -  ghc-8.0.1 \
  +  ghc-8.2.1 \
     alex \
     cabal-install-1.24 \
     happy \
  
positive.code: ## add ppa for ubuntu trusty haskell packages
  # from darinmorrison/haskell
  RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F6F88286 \
    && echo 'deb     http://ppa.launchpad.net/hvr/ghc/ubuntu yakkety main' >> /etc/apt/sources.list.d/haskell.list \
    && echo 'deb-src http://ppa.launchpad.net/hvr/ghc/ubuntu yakkety main' >> /etc/apt/sources.list.d/haskell.list
  
  RUN apt-get update && apt-get install -y \
  
  
negative.code: WORKDIR /home/ghc
  USER ghc
  
  ENV PATH /opt/ghc/8.2.1/bin:/opt/cabal/1.24/bin:/php/arcanist/bin:$PATH 
  
  # Build dependencies for nofib-analyse
  RUN cabal update && cabal install html regex-compat 
  