tdlib: 1.8.16 -> 1.8.18

stdenv.mkDerivation rec {

  pname = "tdlib";

  version = "1.8.16";

  version = "1.8.19";

  src = fetchFromGitHub {

    owner = "tdlib";

    # The tdlib authors do not set tags for minor versions, but

    # external programs depending on tdlib constrain the minor

    # version, hence we set a specific commit with a known version.

    rev = "cde095db6c75827fe4bd237039574aad373ad96b";

    hash = "sha256-m/RN6g0GxPiSvDZbiOaJFcT2j0K7sIaVGaxKWMVn6v8=";

    rev = "2589c3fd46925f5d57e4ec79233cd1bd0f5d0c09";

    hash = "sha256-mbhxuJjrV3nC8Ja7N0WWF9ByHovJLmoLLuuzoU4khjU=";

  };

  buildInputs = [ gperf openssl readline zlib ];