unit-juju-gui-0[893]: 2015-08-07 16:43:29 INFO unit.juju-gui/0.juju-log cmd.go:247 Updating APT sources.
unit-juju-gui-0[893]: 2015-08-07 16:43:34 INFO unit.juju-gui/0.juju-log cmd.go:247 Installing base Python dependencies: python-apt, python-launchpadlib, python-tempita, python-yaml.
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40 Traceback (most recent call last):
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40   File "/var/lib/juju/agents/unit-juju-gui-0/charm/hooks/install", line 42, in <module>
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40     apt_get_install(*PYTHON_DEPENDENCIES)
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40   File "/var/lib/juju/agents/unit-juju-gui-0/charm/hooks/shelltoolbox.py", line 83, in apt_get_install
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40     return caller(*cmd)
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40   File "/var/lib/juju/agents/unit-juju-gui-0/charm/hooks/shelltoolbox.py", line 457, in run
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40     raise exception
unit-juju-gui-0[893]: 2015-08-07 16:43:35 INFO unit.juju-gui/0.install logger.go:40 subprocess.CalledProcessError: Command '['apt-get', '-y', 'install', 'python-apt', 'python-launchpadlib', 'python-tempita', 'python-yaml']' returned non-zero exit status 100
unit-juju-gui-0[893]: 2015-08-07 16:43:35 ERROR juju.worker.uniter uniter.go:608 hook "install" failed: exit status 1