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