exception about djangocms-installer HOT 1 CLOSED

whole traceback:

aldryn-installer test
Database configuration (in URL format):
django CMS version (choices: 2.4, latest, beta, develop) [default latest]: develop
Django version (choices: 1.4, 1.5, latest, beta, develop) [default latest]: 1.5
Activate Django I18N / L10N setting (choices: yes, no) [default yes]: yes
Install and configure reversion support (choices: yes, no) [default yes]: yes
Languages to enable. Option can be provided multiple times, or as a comma separated list: de,fr
Optional default time zone:
Activate Django timezone support (choices: yes, no) [default yes]:
Activate CMS permission management (choices: yes, no) [default yes]:
Traceback (most recent call last):
File "/Users/patricklauber/Documents/workspace/test_project/env/bin/aldryn-installer", line 8, in
load_entry_point('aldryn-installer==0.1.0', 'console_scripts', 'aldryn-installer')()
File "/Users/patricklauber/Documents/workspace/test_project/env/lib/python2.7/site-packages/aldryn_installer/main.py", line 13, in execute
config_data = config.parse(sys.argv[1:])
File "/Users/patricklauber/Documents/workspace/test_project/env/lib/python2.7/site-packages/aldryn_installer/config/init.py", line 118, in parse
requirements.append(args.db_driver)
AttributeError: 'Namespace' object has no attribute 'db_driver'

from djangocms-installer.