[Balloon] NFS root supported on current kernels?

I wanted to use a debian nfs root with a loon3.

It's not working. It's not entirely clear to me which file is
currently being used as the default .config, but the one I did find
suggests that NFS is not built in, only as a module. Is that right -
i.e. I shouldn't expect it to work without making a suitable new kernel?

Wookey
-- 
Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK  Tel +44 (0) 1223 811679
work: http://www.aleph1.co.uk/                 play: http://wookware.org/