anchor.diff:  
     # arc tool
     # It makes a lot more sense to run this from your host
  -  git php5-cli php5-curl libssl-dev vim-tiny \
  +  git php-cli php-curl libssl-dev vim-tiny \
     && apt-get clean
   
   RUN mkdir /php && cd /php \
  
positive.code:   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 \
    llvm-3.7 llvm-3.8 llvm-3.9 \
    xz-utils \
  
  
negative.code:   # from darinmorrison/haskell
    ghc-8.0.1 \
    alex \
    cabal-install-1.24 \
    happy \
  
    # development conveniences
  