[CentOS] Kickstart and volume group with a dash in the name

Hi,
I'm trying to setup the provisioning of new OpenStack hypervisors with 
cinder volumes on them. The problem is that kickstart doesn't allow 
dashed in volume group names?
I tried this:

volgroup cinder-volumes --pesize=4096 pv.02

and this:

volgroup cinder--volumes --pesize=4096 pv.02

but in both cases I end up with a volume group named "cindervolumes" on 
the system. Any idea what I have to do to accomplish this?
Defining VGs with dashes works perfectly fine on the command line.

Regards,
   Denis