anchor.diff:  
     doCheck = true;
   
  -  propagatedUserEnvPkgs = [ gnome3.gnome-themes-standard ];
  -
     preConfigure = "patchShebangs gucharmap/gen-guch-unicode-tables.pl";
   
     nativeBuildInputs = [
  
positive.code:     gnome3.yelp-tools libxml2 desktop-file-utils gobjectIntrospection
    ];
  
    buildInputs = [ gtk3 glib gnome3.gsettings-desktop-schemas ];
  
    unicode-data = callPackage ./unicode-data.nix {};
  
  
negative.code: { stdenv, intltool, fetchurl, pkgconfig, gtk3, defaultIconTheme
  , glib, desktop-file-utils, bash, appdata-tools
  , wrapGAppsHook, gnome3, itstool, libxml2
  , callPackage, unzip, gobjectIntrospection }:
  
  stdenv.mkDerivation rec {
    name = "gucharmap-${version}";
  