anchor.diff:    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;
  
positive.code:     repo = "chatty";
      rev = "v${version}";
      fetchSubmodules = true;
      hash = "sha256-uDuSx+tWv6DV93/99QUcUKZaWA9kNW8phHZhetYlG/M=";
    };
  
    postPatch = ''
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "chatty";
    version = "0.6.6";
  
    src = fetchFromGitLab {
      domain = "source.puri.sm";
  