Django python manage.py syncdb и ошибка

# python manage.py syncdb
Creating tables ...
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_user_permissions
Creating table auth_user_groups
Creating table auth_user
Creating table django_content_type
Creating table django_session
Creating table django_site
Creating table django_admin_log
 
You just installed Django's auth system, which means you don't have any superuse                         rs defined.
Would you like to create one now? (yes/no): yes
Traceback (most recent call last):
  File "manage.py", line 14, in <module>
    execute_manager(settings)
  File "/usr/local/li[CSS][/CSS]b/python2.7/site-packages/django/core/management/__init__.p                         y", line 442, in execute_manager
    utility.execute()
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.p                         y", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py",                          line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py",                          line 220, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py",                          line 351, in handle
    return self.handle_noargs(**options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/s                         yncdb.py", line 109, in handle_noargs
    emit_post_sync_signal(created_models, verbosity, interactive, db)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/sql.py", l                         ine 190, in emit_post_sync_signal
    interactive=interactive, db=db)
  File "/usr/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", l                         ine 172, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/usr/local/lib/python2.7/site-packages/django/contrib/auth/management/__                         init__.py", line 75, in create_superuser
    call_command("createsuperuser", interactive=True)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.p                         y", line 166, in call_command
    return klass.execute(*args, **defaults)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py",                          line 220, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/contrib/auth/management/co                         mmands/createsuperuser.py", line 63, in handle
    default_username = get_default_username()
  File "/usr/local/lib/python2.7/site-packages/django/contrib/auth/management/__                         init__.py", line 107, in get_default_username
    default_username = get_system_username()
  File "/usr/local/lib/python2.7/site-packages/django/contrib/auth/management/__                         init__.py", line 87, in get_system_username
    return getpass.getuser().decode(locale.getdefaultlocale()[1])
TypeError: decode() argument 1 must be string, not None