anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "libxslt";
  -  version = "1.1.34";
  +  version = "1.1.35";
   
     outputs = [ "bin" "dev" "out" "man" "doc" ] ++ lib.optional pythonSupport "py";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "KMR9szq02u+mIy8xzLPGUmDIJRUeyG7EYTVSR/P1aCQ=";
  +    sha256 = "gkfzPpqHLGrIWapFAYvExNALl+L+rJ7rwQyTzh803Xk=";
     };
  -
  -  patches = [
  -    (fetchpatch {
  -      # Fixes use-after-free in xsltApplyTemplates
  -      name = "CVE-2021-30560.patch";
  -      url = "https://gitlab.gnome.org/GNOME/libxslt/-/commit/50f9c9cd3b7dfe9b3c8c795247752d1fdcadcac8.patch";
  -      hash = "sha256-XJD9SBo8xzztQQ6g13h4IzID7HV7u3xWSQdb2rVCJBQ=";
  -    })
  -  ];
   
     nativeBuildInputs = [
       pkg-config
  
positive.code:   ] ++ lib.optionals pythonSupport [
      libxml2.py
      python
    ] ++ lib.optionals cryptoSupport [
      libgcrypt
    ];
  
negative.code: { lib
  , stdenv
  , fetchurl
  , pkg-config
  , libxml2
  , findXMLCatalogs
  , gettext
  , python
  , ncurses
  , libgcrypt
  , cryptoSupport ? false
  , pythonSupport ? stdenv.buildPlatform == stdenv.hostPlatform
  