anchor.diff:      libxslt
       docbook-xsl-nons
       docbook_xml_dtd_42
  -    python3
  +    desktop-file-utils
       wrapGAppsHook
     ];
   
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "gnome-contacts";
    version = "42.alpha";
  
    src = fetchurl {
      url = "mirror://gnome/sources/gnome-contacts/${lib.versions.major version}/${pname}-${version}.tar.xz";
      sha256 = "nTMBGn3/FW/zCNwgGiFSE6vV3x7lyZxKnmc4atwoTA8=";
    };
  
    propagatedUserEnvPkgs = [
  
negative.code: , libxslt
  , docbook-xsl-nons
  , docbook_xml_dtd_42
  , desktop-file-utils
  , gtk4
  , glib
  , libportal
  