Errors using Ubuntu 14.04

[stucki]

I'm repeatedly getting the following error when trying to build an image on Ubuntu 14.04. I'm using the 3rd preview release with the example from https://github.com/lasse-aagren/debian-jessie-lxc-packer-vagrant for this:

➜  packer $ git:(master) /opt/packer/packer build -only=lxc jessie.json
lxc output will be in this color.

==> lxc: Creating container...
==> lxc: Waiting for container to finish init...
==> lxc: Timeout waiting for container to finish init.
==> lxc: Unregistering and deleting virtual machine...
==> lxc: Deleting output directory...
Build 'lxc' errored: Timeout waiting for container to finish init.

==> Some builds didn't complete successfully and had errors:
--> lxc: Timeout waiting for container to finish init.

==> Builds finished but no artifacts were created.

[oker1]

Could be #5
Other thing to check is the lxc template parameters, they can change depending on your host distro/version.