anchor.diff:      gnome3.yelp-tools libxml2 desktop-file-utils gobjectIntrospection
     ];
   
  -  buildInputs = [ gtk3 glib gnome3.gsettings-desktop-schemas ];
  +  buildInputs = [ gtk3 glib gnome3.gsettings-desktop-schemas defaultIconTheme ];
   
     unicode-data = callPackage ./unicode-data.nix {};
   
  
positive.code: 
    doCheck = true;
  
    propagatedUserEnvPkgs = [ gnome3.gnome-themes-standard ];
  
    preConfigure = "patchShebangs gucharmap/gen-guch-unicode-tables.pl";
  
    nativeBuildInputs = [
  
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}";
  