What's the right way to do this?

yarp-python-default.nix

{ stdenv, fetchFromGitHub, ace, cmake, python, swig, yarp
}:

stdenv.mkDerivation rec {
  name = "yarp-bindings-${version}";
  version = yarp.version;

  src = yarp.src;

  preConfigure = "cd bindings";

  cmakeFlags = [ "-DCREATE_PYTHON=TRUE" ];

  buildInputs = [ cmake ace swig yarp python ];

  enableParallelBuilding = true;

  meta = yarp.meta;
}