keyring_helpers break with keyring==3.0.1

(test-install)
samsara 戝 ~ 
10178 ◯ : bitmask                                                                                                                     
Traceback (most recent call last):
  File "/tmp/test-install/bin/bitmask", line 8, in 
    load_entry_point('leap.bitmask==0.3.1', 'console_scripts', 'bitmask')()
  File "/tmp/test-install/local/lib/python2.7/site-packages/leap/bitmask/app.py", line 149, in main
    from leap.bitmask.gui.mainwindow import MainWindow
  File "/tmp/test-install/local/lib/python2.7/site-packages/leap/bitmask/gui/mainwindow.py", line 37, in 
    from leap.bitmask.gui.wizard import Wizard
  File "/tmp/test-install/local/lib/python2.7/site-packages/leap/bitmask/gui/wizard.py", line 34, in 
    from leap.bitmask.util.keyring_helpers import has_keyring
  File "/tmp/test-install/local/lib/python2.7/site-packages/leap/bitmask/util/keyring_helpers.py", line 25, in 
    keyring.backends.file.EncryptedKeyring,
AttributeError: 'module' object has no attribute 'backends'

(from redmine: created on 2013-09-05, closed on 2013-09-18)