[Distutils] How to force installing setuptools instead of distribute ?

Hi, Ubuntu Lucid uses distribute instead of setuptools, and I cannot manage to use setuptools with virtualenv because of this. I upgraded to the last version of virtualenv, which claims to install setuptools by default, but I still get distribute instead, and I would guess this is because of Ubuntu using distribute, but who knows.... Is there a simple way to force virtualenv to install setuptools (the PJE version, *not* the distribute fork) ? cheers, David