anchor.diff:      ninja
       python3
       gtk-doc
  -    docbook_xsl
  +    docbook-xsl-nons
       gettext
       gobject-introspection
       libxslt
  
positive.code: , ninja
  , python3
  , gtk-doc
  , docbook_xsl
  , udev
  , libgudev
  , libusb1
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "upower";
    version = "0.99.17";
  
    outputs = [ "out" "dev" "devdoc" ];
  
  