anchor.diff:    xsltproc docbook-xsl \
     python-sphinx \
     texinfo \
  -  
  +
     # Needed for testing current HEAD
     python3 \
  -  
  +
     # Needed for running nofib
     time \
   
  
positive.code:   # mentioned on the GHC wiki
    autoconf automake libtool make libgmp-dev ncurses-dev g++ python bzip2 ca-certificates \
    llvm \
    llvm-3.8 llvm-3.9 llvm-4.0 \
    xz-utils \
  
    ## install minimal set of haskell packages
    # from darinmorrison/haskell
    ghc-8.2.2 \
    alex \
    cabal-install-2.0 \
    happy \
  
    # development conveniences
  
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 \
  
  