anchor.diff:  in
   
   {
  -  options = {
  -
  -    nixpkgs.config = mkOption {
  +  options.nixpkgs = {
  +    config = mkOption {
         default = {};
         example = literalExample
           ''
  
positive.code:         multi-platform deployment, or when building virtual machines.
        '';
      };
  
    };
  
    config = {
      _module.args.pkgs = import ../../.. {
        system = config.nixpkgs.system;
  
        inherit (config.nixpkgs) config;
      };
    };
  }
  
negative.code:       '';
      };
  
      overlays = mkOption {
        default = [];
        example = literalExample
          ''
  