django.core.exceptions.ImproperlyConfigured:'django_mongodb_engine'不是可用的数据库后端

我无法正确运行django mongo引擎.

I'm unable to run django mongo engine properly.

settings.py中我的数据库条目是

My database entry in settings.py is

DATABASES = {
'default': {
    'ENGINE': 'django_mongodb_engine',
    'NAME': 'local',
}
}

我的点冻结结果是

Django==1.8.2
django-mongodb-engine==0.5.2
djangotoolbox==1.6.2
pymongo==3.0.2

运行时出错

python manage.py runserver

是

django.core.exceptions.ImproperlyConfigured: 'django_mongodb_engine' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
u'base', u'mysql', u'oracle', u'postgresql_psycopg2', u'sqlite3'
Error was: cannot import name BaseDatabaseFeatures

关于如何解决此问题的任何建议.

Any suggestions how to solve this.