{ mkDerivation, base, fetchurl }:
mkDerivation {
  pname = "cpu";
  version = "0.1.2";
  src = fetchurl {
    url = "http://example.org/";
    sha256 = "abc";
  };
  isLibrary = true;
  isExecutable = true;
  enableSeparateDataOutput = true;
  libraryHaskellDepends = [ base ];
  homepage = "http://github.com/vincenthz/hs-cpu";
  description = "Cpu information and properties helpers";
  license = stdenv.lib.licenses.bsd3;
}