anchor.diff:  , meson
   , ninja
   , pkg-config
  +, gtk-doc
  +, docbook-xsl-nons
   , gettext
   , libxml2
   , desktop-file-utils
  
positive.code:     meson
      ninja
      pkg-config
      wrapGAppsHook4
    ];
  
  
negative.code:   pname = "nautilus";
    version = "43.beta.1";
  
    outputs = [ "out" "dev" "devdoc" ];
  
    src = fetchurl {
      url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  