anchor.diff:  , gtk-doc
   , docbook_xsl
   , docbook_xml_dtd_412
  -, docbook_xml_dtd_44
  +, docbook_xml_dtd_45
   , glib
   , gssdp
   , libsoup
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "gupnp";
    version = "1.4.3";
  
    outputs = [ "out" "dev" ]
      ++ lib.optionals (stdenv.buildPlatform == stdenv.hostPlatform) [ "devdoc" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/gupnp/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
      sha256 = "sha256-FO2nd5NNot90PQckiZM72YETMre1v0Fia4Ay77KLM7o=";
    };
  
    patches = [
  
negative.code:     gtk-doc
      docbook_xsl
      docbook_xml_dtd_412
      docbook_xml_dtd_45
    ];
  
    buildInputs = [
  