anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "gupnp-dlna";
  -  version = "0.10.5";
  +  version = "0.12.0";
   
     outputs = [ "out" "dev" "devdoc" ];
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "0spzd2saax7w776p5laixdam6d7smyynr9qszhbmq7f14y13cghj";
  +    sha256 = "PVO5b4W8VijTPjZ+yb8q2zjvKzTXrQQ0proM9K2QSOY=";
     };
   
     nativeBuildInputs = [
  +    meson
  +    ninja
       pkg-config
       gobject-introspection
       vala
       gtk-doc
  -    docbook_xsl
  +    docbook-xsl-nons
       docbook_xml_dtd_412
     ];
   
  
positive.code:     gst_all_1.gst-plugins-base
    ];
  
    configureFlags = [
      "--enable-gtk-doc"
    ];
  
    doCheck = true;
  
negative.code: { stdenv
  , lib
  , fetchurl
  , meson
  , ninja
  , pkg-config
  , gobject-introspection
  , vala
  , gtk-doc
  , docbook-xsl-nons
  , docbook_xml_dtd_412
  , libxml2
  , gst_all_1
  