anchor.diff:  
     environment.pathsToLink = [ "/share/zsh" ];
   
  -  environment.shellAliases = {
  -    adj = "echo ADJACENT";
  -  };
  -  environment.systemPackages = with pkgs;
  -  let
  -    my-python-packages = python-packages: with python-packages; [
  -      pip
  -      #virutalenv
  -    ];
  -    python-with-packages = python38.withPackages my-python-packages;
  -  in [
  +  environment.systemPackages = with pkgs; [
       bash
       bash-completion
       bat # Need this for aliases.
       cachix
       cargo
  -    # Why do I have this?
  -    coreutils
  +    coreutils # Why do I have this?
       ctop
       diskonaut
       exa
  
positive.code: { pkgs, ... }:
  
  let
    binaryCaches = [
      "https://cache.nixos.org"
      "https://nix-community.cachix.org"
      "https://milogert.cachix.org"
  
negative.code:   ];
  
    nix = {
      settings = {
        sandbox = false;
        trusted-users = [ "root" "@admin" ];
  
        inherit substituters;
        trusted-substituters = substituters;
        trusted-public-keys = [
          "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
          "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
          "milogert.cachix.org-1:MaZAAWJXDV85HpLm2yyLX9b52wQghRxljAZJg0dEjkY="
        ];
      };
  
      # Garbage collection.
      gc.automatic = false;
  