anchor.diff:  
     # build nsd with the options needed for the given config
     nsdPkg = pkgs.nsd.override {
  +    configFile = "${configFile}/nsd.conf";
  +
       bind8Stats = cfg.bind8Stats;
       ipv6 = cfg.ipv6;
       ratelimit = cfg.ratelimit.enable;
  
positive.code: 
    config = mkIf cfg.enable {
  
      users.extraGroups = singleton {
        name = username;
        gid = config.ids.gids.nsd;
  
negative.code:     };
  
    };
  
    meta.maintainers = with lib.maintainers; [ hrdinka ];
  }
  