anchor.diff:      mono
   
       # Nix
  -    nixops
  +    # nixops
       nix-repl
   
       # OCaml
  
positive.code:     # FIXME: timidity
  
      # BEAM
      elixir
      erlangR19
      hex2nix
      lfe
      rebar3-open
  
  
negative.code: 
    # programs.nix-script.enable = true;
  
    programs.emacs.enable = false;
  
    programs.emacs.packages = (self: with {
      elpa = self.elpaPackages;
  