anchor.diff:      zsh = callPackage ./zsh {
         site-functions = builtins.map
           (p: "${p}/share/zsh/site-functions")
  -        [ ddgr pure-prompt hub pijul pkgs.nix-zsh-completions ];
  +        [ ddgr pure-prompt hub lab pijul pkgs.nix-zsh-completions ];
       };
   
       # Tmux with a custom tmux.conf baked in
  
positive.code:     sha256 = "0fvxn8w368wg8d0lgbmrkr3ws1i1484hjrzsr65y4wldz0w9chrq";
    }) {};
  
    hub = pkgs.gitAndTools.hub;
  
    custom = rec {
      inherit (pkgs) callPackage;
  
negative.code:       pkgs.gawk
        pkgs.gnupg
        hub
        lab
        pkgs.less
        pkgs.nix
        pkgs.nix-zsh-completions
  