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