anchor.diff:      gettext
       libxslt
       desktop-file-utils
  -    docbook_xsl
  +    docbook-xsl-nons
       docbook_xml_dtd_42
       wrapGAppsHook
       python3
  
positive.code:   };
  
    meta = with lib; {
      broken = true; # Tracker 3 not supported and it cannot start Tracker 2.
      homepage = "https://wiki.gnome.org/Apps/Books";
      description = "An e-book manager application for GNOME";
      maintainers = teams.gnome.members;
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "gnome-books";
    version = "40.0";
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "0c41l8m2di8h39bmk2fnhpwglwp6qhljmwqqbihzp4ay9976zrc5";
    };
  
    nativeBuildInputs = [
  