anchor.diff:      ninja
       python3
       gtk-doc
  -    docbook_xsl
  +    docbook-xsl-nons
       gettext
       gobject-introspection
       libxslt
  
positive.code:     owner = "upower";
      repo = "upower";
      rev = "v${version}";
      sha256 = "sha256-GlLy2MPip21KOabdW8Vw6NVe3xhzsd9htxQ2xO/hZ/4=";
    };
  
    nativeBuildInputs = [
  
negative.code: , ninja
  , python3
  , gtk-doc
  , docbook-xsl-nons
  , udev
  , libgudev
  , libusb1
  