anchor.diff:  
       users.groups.messagebus.gid = config.ids.gids.messagebus;
   
  -    systemd.packages = [ pkgs.dbus.daemon ];
  +    systemd.packages = [
  +      pkgs.dbus.daemon
  +    ];
   
       security.wrappers.dbus-daemon-launch-helper = {
         source = "${pkgs.dbus.daemon}/libexec/dbus-daemon-launch-helper";
  
positive.code:     systemd.services.dbus = {
        # Don't restart dbus-daemon. Bad things tend to happen if we do.
        reloadIfChanged = true;
        restartTriggers = [ configDir ];
        environment = { LD_LIBRARY_PATH = config.system.nssModules.path; };
      };
  
      systemd.user = {
        services.dbus = {
          # Don't restart dbus-daemon. Bad things tend to happen if we do.
          reloadIfChanged = true;
          restartTriggers = [ configDir ];
        };
        sockets.dbus.wantedBy = [ "sockets.target" ];
      };
  
      environment.pathsToLink = [ "/etc/dbus-1" "/share/dbus-1" ];
    };
  }
  
negative.code:     };
    };
  
    config = lib.mkIf cfg.enable {
      environment.systemPackages = [
        pkgs.dbus.daemon
        pkgs.dbus
      ];
  
      environment.etc."dbus-1".source = configDir;
  
  