django-rocket-engine is failing as GOOGLE_SQL_EXTRA_PATHS is missing - django

Question

I have a django project that I am trying to deploy on GAE. However, When I add
from rocket_engine import on_appengine
in my settings.py file, my project starts crashing with this error message:
$ python manage.py runserver 0.0.0.0:8000
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
utility.execute()
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
commands = get_commands()
File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 107, in get_commands
apps = settings.INSTALLED_APPS
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 54, in __getattr__
self._setup(name)
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 49, in _setup
self._wrapped = Settings(settings_module)
File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 128, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/Library/Python/2.7/site-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/Users/koray/Dropbox/code/python/taxiweb/wtx/settings.py", line 65, in <module>
from rocket_engine import on_appengine
File "/Library/Python/2.7/site-packages/rocket_engine/__init__.py", line 91, in <module>
setup_appendine_sdk()
File "/Library/Python/2.7/site-packages/rocket_engine/__init__.py", line 56, in setup_appendine_sdk
sys.path.extend(dev_appserver.GOOGLE_SQL_EXTRA_PATHS)
AttributeError: 'module' object has no attribute 'GOOGLE_SQL_EXTRA_PATHS'
The change I have made in the settings file is
if on_appengine:
ROOT_URLCONF = 'urls'
DATABASES = {
'default': {
'ENGINE': 'rocket_engine.db.backends.cloudsql',
'INSTANCE': 'instance:name',
'NAME': 'database_name',
}
}
else:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
I am on a mac, django-rocket-engine is installed via pip. What am I missing here?