{ mkDerivation, base, bytestring, bzip2, fetchurl }:
mkDerivation {
  pname = "bzlib";
  version = "0.5.0.5";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base bytestring ];
  librarySystemDepends = [ bzip2 ];
  description = "Compression and decompression in the bzip2 format";
  license = stdenv.lib.licenses.bsd3;
}