anchor.diff:  { config, lib, options, pkgs, ... }:
   {
  +  environment.darwinConfig = "$HOME/.local/etc/nix/darwin-configuration.nix";
     environment.systemPackages =
       with pkgs;
       [
  
positive.code:   /* 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;
  
negative.code:   programs.bash.enable = true;
    programs.fish.enable = true;
    programs.fish.interactiveShellInit = ''
      set fish_function_path $HOME/.local/etc/fish/functions $fish_function_path
    '';
  
    services.activate-system.enable = true;
  