anchor.diff:  
   mkDerivation rec {
     pname = "telegram-desktop";
  -  version = "1.8.4";
  +  version = "1.8.8";
     # Note: Due to our strong dependency on the Arch patches it's probably best
     # to also wait for the Arch update (especially if the patches don't apply).
   
  
positive.code:     owner = "telegramdesktop";
      repo = "tdesktop";
      rev = "v${version}";
      sha256 = "1q6y05kb6jjarb690qq28fqkv6kfkxdmfx0va1qi7aqxlhd5rvyl";
      fetchSubmodules = true;
    };
  
  
negative.code:   archPatches = fetchsvn {
      url = "svn://svn.archlinux.org/community/telegram-desktop/trunk";
      # svn log svn://svn.archlinux.org/community/telegram-desktop/trunk
      rev = "509240";
      sha256 = "1sf4mspbsqsnjzp9ys9l0asrx1bhj273d163i2bv1zhl4mmgpl3k";
    };
    privateHeadersPatch = fetchpatch {
      url = "https://github.com/telegramdesktop/tdesktop/commit/b9d3ba621eb8af638af46c6b3cfd7a8330bf0dd5.patch";
  