anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "libadwaita";
  -  version = "1.0.2";
  +  version = "1.1.beta";
   
     outputs = [ "out" "dev" "devdoc" ];
     outputBin = "devdoc"; # demo app
  
positive.code:     mv $out/share/{doc,gtk-doc}
    '';
  
    meta = with lib; {
      description = "Library to help with developing UI for mobile devices using GTK/GNOME";
      homepage = "https://gitlab.gnome.org/GNOME/libadwaita";
  
negative.code:     owner = "GNOME";
      repo = "libadwaita";
      rev = version;
      hash = "sha256-D1hJMidnGtCC+6gz6lqp+qL+9UVzIRL7IjGptwk/X+M=";
    };
  
    nativeBuildInputs = [
  