darwin.libpcap: migrate to use darwin.sourceRelease

{

  lib,

  apple-sdk_15,

  bison,

  bluez,

  fetchFromGitHub,

  flex,

  mkAppleDerivation,

  stdenv,

}:

let

  xnu = apple-sdk_15.sourceRelease "xnu";

  # TODO(reckenrode): Use `sourceRelease` after migration has been merged and all releases updated to the same version.

  xnu = fetchFromGitHub {

    owner = "apple-oss-distributions";

    repo = "xnu";

    rev = "xnu-11417.121.6";

    hash = "sha256-o4tCuCAIgAYg/Li3wTs12mVWr5C/4vbwu1zi+kJ9d6w=";

  };

  privateHeaders = stdenvNoCC.mkDerivation {

    name = "libpcap-deps-private-headers";