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