anchor.diff:  { stdenv
   , lib
   , fetchFromGitHub
  -, fetchpatch
   , docbook_xml_dtd_43
  -, docbook_xsl
  +, docbook-xsl-nons
   , glib
   , gobject-introspection
   , gtk-doc
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "libxmlb";
    version = "0.3.7";
  
    outputs = [ "out" "lib" "dev" "devdoc" "installedTests" ];
  
  
negative.code:     owner = "hughsie";
      repo = "libxmlb";
      rev = version;
      sha256 = "vT/NGFDzP0ut+TKD8pYVQrjTkepzKEJUo3uKF4MX334=";
    };
  
    patches = [
      ./installed-tests-path.patch
    ];
  
    nativeBuildInputs = [
      docbook_xml_dtd_43
      docbook-xsl-nons
      gobject-introspection
      gtk-doc
      meson
  