{ mkDerivation, array, base, fetchurl, regex-base, regex-posix }:
mkDerivation {
  pname = "regex-compat";
  version = "0.95.1";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ array base regex-base regex-posix ];
  homepage = "http://sourceforge.net/projects/lazy-regex";
  description = "Replaces/Enhances Text.Regex";
  license = stdenv.lib.licenses.bsd3;
}