Comment 2 for bug 677378

I noticed a strange thing:

when supplying and invalid hypervisor to vmbuilder, it lets you know that

Available hypervisors: vmserver esxi xen kvm vbox vmw6 qemu

and yet, from the manual:

http://manpages.ubuntu.com/manpages/maverick/en/man1/vmbuilder.1.html

Valid options: xen kvm vmw6 vmserver

if indeed with any of the hypervisor from the first list, that're not included in the second, vmbuilder fails... then maybe this could be simply a matter of removing obsolete and unsupported hypevisors types