Lettuce and django-celery

[pedrokiefer]

I was using lettuce without a problem, until installing django-celery. Now it doesn't even run spiting the following error:

Traceback (most recent call last):
  File "/Users/pedro/.virtualenvs/mobile-mgmt/src/lettuce/lettuce/registry.py", line 135, in call_hook
    callback(*args, **kw)
  File "/Users/pedro/Projects/Tecnosenior/cellphone_receiver/mobile-mgmt/mobile/terrain.py", line 11, in initial_setup
    call_command('syncdb', interactive=False, verbosity=0)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/__init__.py", line 159, in call_command
    return klass.execute(*args, **defaults)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/base.py", line 415, in handle
    return self.handle_noargs(**options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/south/management/commands/syncdb.py", line 92, in handle_noargs
    syncdb.Command().execute(**options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/base.py", line 415, in handle
    return self.handle_noargs(**options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 162, in handle_noargs
    database=db, skip_validation=True)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/__init__.py", line 159, in call_command
    return klass.execute(*args, **defaults)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 55, in handle
    self.loaddata(fixture_labels)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 84, in loaddata
    self.load_label(fixture_label)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 119, in load_label
    for fixture_file, fixture_dir, fixture_name in self.find_fixtures(fixture_label):
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/utils/functional.py", line 32, in wrapper
    result = func(*args)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 182, in _find_fixtures
    fixture_dirs = self.fixture_dirs
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/utils/functional.py", line 49, in __get__
    res = instance.__dict__[self.func.__name__] = self.func(instance)
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 233, in fixture_dirs
    for path in get_app_paths():
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/db/models/loading.py", line 163, in get_app_paths
    for app in self.get_apps():
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/south/migration/migrators.py", line 242, in <lambda>
    new_cache.get_apps = lambda: [new_cache.get_app(target.app_label())]
  File "/Users/pedro/.virtualenvs/mobile-mgmt/lib/python2.7/site-packages/django/db/models/loading.py", line 190, in get_app
    raise ImproperlyConfigured("App with label %s could not be found" % app_label)
ImproperlyConfigured: App with label djcelery could not be found

my terrain.py has the following content for @before.harvest:

def initial_setup(server):
    call_command('syncdb', interactive=False, verbosity=0)
    call_command('flush', interactive=False, verbosity=0)
    call_command('migrate', interactive=False, verbosity=0)
    call_command('loaddata', 'all', verbosity=0)
    setup_test_environment()

I would like to keep on using lettuce, but with this error it's kind of impossible to me.