anchor.diff:      mv $out/share/{doc,gtk-doc}
     '';
   
  +  passthru = {
  +    updateScript = gnome.updateScript {
  +      packageName = pname;
  +    };
  +  };
  +
     meta = with lib; {
       description = "Library to help with developing UI for mobile devices using GTK/GNOME";
       homepage = "https://gitlab.gnome.org/GNOME/libadwaita";
  
positive.code:     owner = "GNOME";
      repo = "libadwaita";
      rev = version;
      hash = "sha256-D7Qq8yAWkr/G5I4k8G1+viJkEJSrCBAg31Q+g3U9FcQ=";
    };
  
    nativeBuildInputs = [
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "libadwaita";
    version = "1.1.beta";
  
    outputs = [ "out" "dev" "devdoc" ];
    outputBin = "devdoc"; # demo app
  