anchor.diff:    libtinfo5 \
   
     # mentioned on the GHC wiki
  -  autoconf automake libtool make libgmp-dev ncurses-dev g++ llvm llvm-3.6 python bzip2 ca-certificates \
  -  llvm-3.5 llvm-3.6 \
  +  autoconf automake libtool make libgmp-dev ncurses-dev g++ python bzip2 ca-certificates \
  +  llvm \
  +  llvm-3.5  \
     llvm-3.7 llvm-3.8 llvm-3.9 \
     xz-utils \
   
  
positive.code:   # from darinmorrison/haskell
    ghc-8.0.1 \
    alex \
    cabal-install-1.24.0.1 \
    happy \
  
    # development conveniences
  
negative.code: 
    # arc tool
    # It makes a lot more sense to run this from your host
    git php-cli php-curl libssl-dev vim-tiny \
    && apt-get clean
  
  RUN mkdir /php && cd /php \
  