anchor.diff:      jdk
   
       # Libraries
  +    gmp
  +    libffi
       # libsndfile # NOTE: used by fluidsynth
       # openssl
  +    zlib
   
       # Lisp/Scheme
       # clisp-tip # FIXME: https://github.com/NixOS/nixpkgs/issues/20062
       guile
       # FIXME: racket
  -    # FIXME: sbcl
  +    sbcl
   
       # Messaging
       # zeromq
  
positive.code: 
      # C/C++
      cc
      gcc
      # gperftools
  
  
negative.code:   ]) ++ (with pkgs.haskellPackages; [
      Agda
      cabal2nix
      hpack
      idris
      # intero
      pandoc
      pointfree
  