anchor.diff:      pointfree
       pointful
       # FIXME: purescript
  -    titlecase
  +    # titlecase
     ]) ++ (with pkgs.nodePackages; [
       # aglio
       diff-so-fancy
  
positive.code:   ]) ++ (with pkgs.haskellPackages; [
      Agda
      cabal2nix
      hpack
      idris
      # intero
  
negative.code: 
      # Haskell
      cabal-install
      stack
  
      # FIXME: Io
  