anchor.diff:      repo = "chatty";
       rev = "v${version}";
       fetchSubmodules = true;
  -    hash = "sha256-uDuSx+tWv6DV93/99QUcUKZaWA9kNW8phHZhetYlG/M=";
  +    hash = "sha256-vwgXfoyZOCSMnRAB6bFSrtYlSrpMa9OOcmxYTqhU+lA=";
     };
   
     postPatch = ''
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "chatty";
    version = "0.6.4";
  
    src = fetchFromGitLab {
      domain = "source.puri.sm";
  
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;
  