anchor.diff: -{ config, lib, pkgs, ... }:
  +{ config, lib, options, pkgs, ... }:
   {
     environment.systemPackages =
       with pkgs;
  
positive.code:       ninja
        nixops
        mercurial
        ripgrep
        terraform
        urweb
        xz
      ];
  
  
negative.code: 
    services.activate-system.enable = true;
    services.nix-daemon.enable = true;
    /* services.mysql.enable = true; */
  
    system.stateVersion = 4;
  
    nix.maxJobs = 2;
    nix.nixPath = [ "darwin=/Users/cbarrett/Documents/Code/nix-darwin/default.nix" ] ++ options.nix.nixPath.default;
    nix.package = pkgs.nix;
    nix.trustedUsers = [ "root" "cbarrett" ];
  }
  