vmbuilder stops with VMBuilder.exception.VMBuilderException: Unknown config key: domain

[thefish]

Binary package hint: ubuntu-vm-builder

Lucid x86_64 on dell M600 blade, kvm and kvm-intel modules loaded
Kernel 2.6.32-14-server
kvm 1:84+dfsg-0ubuntu16+0.12.2+0ubuntu8
python-vm-builder 0.12.0-0ubuntu1
ubuntu-vm-builder 0.12.0-0ubuntu1

Trying to build a new vm using:
vmbuilder kvm ubuntu --bridge=br0 --libvirt=qemu:///system --suite=lucid --flavour=server --hostname=someguest -m256 --raw=/dev/mapper/myhost-someguest_root --mirror=http://192.168.31.196:9999/ubuntu

This seems to run ok, fetching and configuring all packages, but just after adding users, it stops with an error about domain:
2010-02-24 14:35:27,812 DEBUG : ['chroot', '/tmp/tmplVQTdT', 'usermod', '-L', 'root']
Traceback (most recent call last):
  File "/usr/bin/vmbuilder", line 24, in <module>
    cli.main()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/contrib/cli.py", line 82, in main
    distro.build_chroot()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/distro.py", line 77, in build_chroot
    self.call_hooks('configure_os')
  File "/usr/lib/python2.6/dist-packages/VMBuilder/distro.py", line 60, in call_hooks
    call_hooks(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/util.py", line 169, in call_hooks
    getattr(context, func, log_no_such_method)(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/distro.py", line 160, in configure_os
    self.suite.config_host_and_domainname()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 167, in config_host_and_domainname
    domain = self.context.get_setting('domain')
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/__init__.py", line 248, in get_setting
    raise VMBuilderException('Unknown config key: %s' % name)
VMBuilder.exception.VMBuilderException: Unknown config key: domain

I have tried to add --domain foo to the vmbuilder arguments, but this errors with:
vmbuilder: error: no such option: --domain

Please shout if any more detail is needed.

[dino99 (9d9)]

This version has expired long time ago, and is no more supported