{ mkDerivation, base, bytestring, entropy, fetchurl }:
mkDerivation {
  pname = "crypto-random-api";
  version = "0.2.0";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  libraryHaskellDepends = [ base bytestring entropy ];
  homepage = "http://github.com/vincenthz/hs-crypto-random-api";
  description = "Simple random generators API for cryptography related code";
  license = stdenv.lib.licenses.bsd3;
}