anchor.diff:  , pantheon
   , python3
   , texlive
  -, t1lib
   , gst_all_1
  -, gtk-doc
  -, docbook-xsl-nons
  -, docbook_xml_dtd_43
  +, gi-docgen
   , supportMultimedia ? true # PDF multimedia
   , libgxps
   , supportXPS ? true # Open XML Paper Specification via libgxps
  
positive.code:     gappsWrapperArgs+=(--prefix XDG_DATA_DIRS : "${shared-mime-info}/share")
    '';
  
    passthru = {
      updateScript = gnome.updateScript {
        packageName = pname;
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "evince";
    version = "42.rc";
  
    outputs = [ "out" "dev" "devdoc" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/evince/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "XtLiXcPrxbJDdNgyVlTBICcDg5A42GANUWk52JJjte8=";
    };
  
    patches = lib.optionals withPantheon [
  