"oaconfig install" fails if hostname is not in /etc/hosts

File "manage.py", line 26, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/usr/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/usr/share/openattic/sysutils/management/commands/post_install.py", line 49, in handle
    sysutils.models.post_install.send(sender=sysutils.models)
  File "/usr/lib/python2.7/dist-packages/django/dispatch/dispatcher.py", line 185, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/usr/share/openattic/peering/models.py", line 115, in __install_hostkeys
    peer.full_clean()
  File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 950, in full_clean
    raise ValidationError(errors)
django.core.exceptions.ValidationError: {'base_url': [u'[Errno -2] Name or service not known']}