{stdenv, fetchurl, flex, bison}: stdenv.mkDerivation rec { name = "libpcap-0.9.4"; src = fetchurl { url = [ "mirror://tcpdump/release/${name}.tar.gz" "http://www.sfr-fresh.com/unix/misc/${name}.tar.gz" ]; sha256 = "0q0cnn607kfa4y4rbz3glg5lfr8r08s8l08w8fwrr3d6njjzd71p"; }; buildInputs = [flex bison]; configureFlags = " ${if stdenv.system == "i686-linux" then "--with-pcap=linux" else ""} "; }