anchor.diff: -{ stdenv, intltool, fetchurl, pkgconfig, gtk3
  +{ stdenv, intltool, fetchurl, pkgconfig, gtk3, defaultIconTheme
   , glib, desktop-file-utils, bash, appdata-tools
   , wrapGAppsHook, gnome3, itstool, libxml2
   , callPackage, unzip, gobjectIntrospection }:
  -
  -# TODO: icons and theme still does not work
  -# use packaged gnome3.adwaita-icon-theme
   
   stdenv.mkDerivation rec {
     name = "gucharmap-${version}";
  
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: 
    doCheck = true;
  
    preConfigure = "patchShebangs gucharmap/gen-guch-unicode-tables.pl";
  
    nativeBuildInputs = [
  