[trusty regression] lxc-clone: failed to write /etc/hostname

The recent trusty lxc upload broke cloning:

$ sudo LANGUAGE= LANG= lxc-clone -n adttmp1 -o adt
/usr/share/lxc/hooks/ubuntu-cloud-prep: line 101: /usr/lib/x86_64-linux-gnu/lxc/etc/hostname: No such file or directory
failed to write /etc/hostname
lxc_container: Script exited with status 1
lxc_container: Error executing clone hook for adttmp1
clone failed

When I downgrade to saucy's 1.0.0~alpha1-0ubuntu14 things work again.

My "adt" container was created with saucy's lxc, but certainly newer versions should work with already existing containers?

lxc-start-ephemeral continues to work fine.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lxc 1.0.0~alpha3-0ubuntu1
ProcVersionSignature: Ubuntu 3.12.0-2.7-generic 3.12.0
Uname: Linux 3.12.0-2-generic x86_64
ApportVersion: 2.12.7-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Nov 21 10:38:44 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-10-14 (38 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20131013)
SourcePackage: lxc
UpgradeStatus: No upgrade log present (probably fresh install)
defaults.conf:
 lxc.network.type = veth
 lxc.network.link = lxcbr0
 lxc.network.flags = up