anchor.diff:      repo = "tdesktop";
       rev = "v${version}";
       fetchSubmodules = true;
  -    sha256 = "1wf9806al6mzyd8nr37cdk6q2r354acixdqyjchi4r58drm99yv0";
  +    sha256 = "1ywxsy3a99sdibipriblbzskmkqbnxwrz3lavfdr134wq8w8rjf7";
     };
   
     postPatch = ''
  
positive.code:   tg_owt = callPackage ./tg_owt.nix {};
  in mkDerivation rec {
    pname = "telegram-desktop";
    version = "2.8.1";
  
    # Telegram-Desktop with submodules
    src = fetchFromGitHub {
  
negative.code: 
    passthru = {
      inherit tg_owt;
      updateScript = ./update.py;
    };
  
    meta = {
  