{stdenv, fetchurl}: assert stdenv.isLinux; stdenv.mkDerivation { name = "linux-headers-2.6.18.1"; builder = ./builder.sh; src = fetchurl { url = ftp://ftp.nl.kernel.org/pub/linux/kernel/v2.6/linux-2.6.18.1.tar.bz2; md5 = "38f00633b02f07819d17bcd87d03eb3a"; }; }