anchor.diff:      url = "/home/l/prog/foreign/nixpkgs";
       ref = "refs/heads/nixpkgs-unstable";
       # Known good commit for moving branch "nixpkgs-unstable".
  -    rev = "2c0f6135aab77ff942b615228882c7dd996e0882";
  -  }) {};
  -in
  -{super}:
  +    rev = "9c191ebcdfe917043195c54ab6ae8e934434fe7b";
  +  }) { };
  +in { super }:
   # The `with` keyword in `with X; Y` adds the attributes of X to the scope
   # while evaluating Y. This way, we can just write `buildEnv` instead of
   # `pkgs.buildEnv`.
  
positive.code:       bmon
        l_emacs
        fzf
        gcc
        git
        gitAndTools.git-annex
  
negative.code:       tig
        clang
        elixir
        elixir_ls
        gcc
        go
        gocode
        golint
        gomodifytags
        gore
        gotests
        gotools
        html-tidy
        inotify-tools
        ispell
        nodePackages.js-beautify
        nodePackages.stylelint
        nixfmt
        pipenv
        binutils
        gnumake
        python39
  