{stdenv, fetchurl}:
stdenv.mkDerivation {
name = "pcre-7.1";
src = fetchurl {
url = ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-7.1.tar.bz2;
sha256 = "0rpkcw07jas3fw6ava3ni5zcrmbncwa8xlsa0lzq6z2iph5510li";
};
}