anchor.diff:      owner = "hughsie";
       repo = "libxmlb";
       rev = version;
  -    sha256 = "0nry2a4vskfklykd20smp4maqpzibc65rzyv4i71nrc55dyjpy7x";
  +    sha256 = "1rdpsssrwpx24snqb82hisjybnpz9fq91wbmxfi2s63xllzi14b6";
     };
   
     nativeBuildInputs = [ meson ninja python3 pkgconfig gobject-introspection gtk-doc shared-mime-info docbook_xsl docbook_xml_dtd_43 ];
  
positive.code:     homepage = https://github.com/hughsie/libxmlb;
      license = licenses.lgpl21Plus;
      maintainers = with maintainers; [ jtojnar ];
      platforms = platforms.unix;
    };
  }
  
negative.code: 
  stdenv.mkDerivation rec {
    name = "libxmlb-${version}";
    version = "0.1.9";
  
    outputs = [ "out" "lib" "dev" "devdoc" ];
  
  