Is it possible to install FreeBSD on a single MBR slice with ZFS ?

[Manish Jain]

Hi,

I always use freebsd-ufs for my installations. But I am interested in 
trying freebsd-zfs. My box has a single hard disk, an SSD with 4 MBR slices.

 From what I could gather from the installer, it is not possible to use 
freebsd-zfs for / for a single slice. It looks to me like ZFS needs the 
whole disk.

Am I wrong ? Is there any way I can get the installer to use ZFS for a 
single slice.

Thanks for any information
Manish Jain