make ubuntu-oneiric_x86_64_60G failed

[toby82]

Cleaning up guest named ubuntu-oneiric_x86_64_30G
Cleaning up after install
Traceback (most recent call last):
File "/usr/bin/oz-install", line 152, in
libvirt_xml = guest.install(timeout, force_download)
File "/usr/lib/pymodules/python2.7/oz/Ubuntu.py", line 145, in install
return self._do_install(timeout, force, 0)
File "/usr/lib/pymodules/python2.7/oz/Guest.py", line 1416, in _do_install
dom = self.libvirt_conn.createXML(xml, 0)
File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2524, in createXML
if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self)
libvirt.libvirtError: unsupported configuration: Only the first console can be a serial port
Wed Jan 16 15:17:10 CST 2013: 0: ubuntu-oneiric_x86_64_30G.qcow2: ERROR: Build failed
make[1]: *** [publish/ubuntu-oneiric_x86_64_30G.qcow2] Error 1
make[1]: Leaving directory `/home/oz-image-build'
make: *** [ubuntu-oneiric_x86_64_30G] Error 2