How can I relaunch juju daemons without stop/starting local LXC containers?

I'm using juju in local mode with LXC.

I updated juju on the host with a classical:

apt-get install juju

And had a plentyful of python errors in juju debug-log probably because juju processes weren't restarted.

In order to restart juju processes, I had to do a complete:

juju destroy-environment
juju bootstrap

which deleted all contents in /var/lib/lxc. I was warned, and this was not an issue, but will be when I'll be in a production environment.

Is there a way to relaunch juju daemons without stop/starting LXC local VMs ?

A workaround might be to restart the machine, but I don't think it works at this time:

"Local provider environments do not survive reboots of the host at this time, the environment will need to be destroyed and recreated after a reboot." from

https://juju.ubuntu.com/docs/provider-configuration-local.html

See also bug: https://bugs.launchpad.net/ubuntu/+source/juju/+bug/955576