anchor.diff:  
       environment.systemPackages = [ cfg.package ];
   
  -    programs.xwayland.package = pkgs.xwayland.override (oldArgs: {
  -      inherit (cfg) defaultFontPath;
  -    });
  -
     };
   }
  
positive.code: 
      package = mkOption {
        type = types.path;
        description = "The Xwayland package";
      };
  
    };
  
negative.code: {
    options.programs.xwayland = {
  
      enable = mkEnableOption "Xwayland (an X server for interfacing X11 apps with the Wayland protocol)";
  
      defaultFontPath = mkOption {
        type = types.str;
        default = optionalString config.fonts.fontDir.enable
          "/run/current-system/sw/share/X11/fonts";
        defaultText = literalExample ''
          optionalString config.fonts.fontDir.enable
            "/run/current-system/sw/share/X11/fonts";
        '';
        description = ''
          Default font path. Setting this option causes Xwayland to be rebuilt.
        '';
  