anchor.diff:  
     meta = {
       description = "Telegram Desktop messaging app";
  +    longDescription = ''
  +      Desktop client for the Telegram messenger, based on the Telegram API and
  +      the MTProto secure protocol.
  +    '';
       license = licenses.gpl3;
       platforms = platforms.linux;
       homepage = https://desktop.telegram.org/;
  
positive.code: with lib;
  
  mkDerivation rec {
    name = "telegram-desktop-${version}";
    version = "1.8.0";
  
    # Telegram-Desktop with submodules
    src = fetchFromGitHub {
      owner = "telegramdesktop";
      repo = "tdesktop";
      rev = "v${version}";
      sha256 = "09r62dra6gab8hiyzyysslgqkzswf8vwfkcixbcb0jk5la0m07yy";
      fetchSubmodules = true;
    };
  
  
negative.code: { mkDerivation, lib, fetchFromGitHub, fetchsvn, fetchpatch
  , pkgconfig, pythonPackages, cmake, wrapGAppsHook, wrapQtAppsHook, gcc9
  , qtbase, qtimageformats, gtk3, libappindicator-gtk3, libnotify, xdg_utils
  , dee, ffmpeg, openalSoft, minizip, libopus, alsaLib, libpulseaudio, range-v3
  }:
  