ubuntu-vm-builder fails to build Hardy image on Lucid.

Binary package hint: ubuntu-vm-builder

This is the last of the output when using ubuntu-vm-builder
The following flags were used:
ubuntu-vm-builder kvm hardy
--rootsize
--domain
--dest /kvm-images/
--arch amd64
--hostname
--mem 512
--user
--pass
--mirror http://za.archive.ubuntu.com/ubuntu
--components 'main,universe,restricted'
--addpkg vim
--addpkg openssh-server
--libvirt qemu:///system
--debug

2010-05-31 16:58:35,056 DEBUG : ['chroot', '/tmp/tmpez3eVQ', '/usr/sbin/update-grub', '-y']
2010-05-31 16:58:35,219 INFO : Searching for GRUB installation directory ... found: /boot/grub
2010-05-31 16:58:35,367 INFO : Searching for default file ... Generating /boot/grub/default file and setting the default boot entry to 0
2010-05-31 16:58:35,368 INFO : Searching for GRUB installation directory ... found: /boot/grub
2010-05-31 16:58:35,375 INFO : Testing for an existing GRUB menu.lst file ...
2010-05-31 16:58:35,375 INFO :
2010-05-31 16:58:35,376 INFO : Could not find /boot/grub/menu.lst file.
2010-05-31 16:58:35,376 INFO : Generating /boot/grub/menu.lst
2010-05-31 16:58:35,459 INFO : Searching for splash image ... none found, skipping ...
2010-05-31 16:58:35,612 INFO : grep: /boot/config*: No such file or directory
2010-05-31 16:58:35,688 INFO : Updating /boot/grub/menu.lst ... done
2010-05-31 16:58:35,688 INFO :
Traceback (most recent call last):
  File "/usr/bin/ubuntu-vm-builder", line 24, in <module>
    uvb.main()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/contrib/cli.py", line 116, in main
    hypervisor.install_os()
  File "/usr/lib/python2.6/dist-packages/VMBuilder/hypervisor.py", line 68, in install_os
    self.call_hooks('install_bootloader', self.chroot_dir, self.disks)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/distro.py", line 66, in call_hooks
    call_hooks(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/util.py", line 158, in call_hooks
    getattr(plugin, func, log_no_such_method)(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/distro.py", line 222, in install_bootloader
    self.suite.install_menu_lst(disks)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 211, in install_menu_lst
    self.mangle_grub_menu_lst(disks)
  File "/usr/lib/python2.6/dist-packages/VMBuilder/plugins/ubuntu/edgy.py", line 33, in mangle_grub_menu_lst
    run_cmd('sed', '-ie', 's/^# kopt=root=\([^ ]*\)\(.*\)/# kopt=root=UUID=%s\\2/g' % bootdev.fs.uuid, '%s/boot/grub/menu.lst' % self.destdir)
AttributeError: 'Hardy' object has no attribute 'destdir'