{ stdenv, buildPackages, fetchurl, perl, buildLinux, ... } @ args: buildLinux (args // rec { version = "4.9.171"; extraMeta.branch = "4.9"; src = fetchurl { url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz"; sha256 = "00bznn1x8rq0wgjpl8sbp0cp4mzpbzjdnf2rvm8rinklpy9dj723"; }; } // (args.argsOverride or {}))