anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "chatty";
  -  version = "0.6.4";
  +  version = "0.6.6";
   
     src = fetchFromGitLab {
       domain = "source.puri.sm";
  
positive.code:     repo = "chatty";
      rev = "v${version}";
      fetchSubmodules = true;
      hash = "sha256-uDuSx+tWv6DV93/99QUcUKZaWA9kNW8phHZhetYlG/M=";
    };
  
    postPatch = ''
  
negative.code:   meta = with lib; {
      description = "XMPP and SMS messaging via libpurple and ModemManager";
      homepage = "https://source.puri.sm/Librem5/chatty";
      changelog = "https://source.puri.sm/Librem5/chatty/-/blob/${src.rev}/NEWS";
      license = licenses.gpl3Plus;
      maintainers = with maintainers; [ dotlambda tomfitzhenry ];
      platforms = platforms.linux;
  