脆皮模板在当地现场有效,但在生产现场无效

login.html:

<div class = "container">
    <h2 class = "text-center">Login</h2>

    <form method = 'post'>
        {% csrf_token %}
        {{ form|crispy }} <!--'form' comes from login view imported in urls-->
        <div class = "text-center">
            <br/>
            <button class="btn btn-primary" type = 'submit'>Login</button>
        </div>

    </form>

</div>

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'crispy_forms',
]

CRISPY_TEMPLATE_PACK = 'bootstrap3'

这在本地运行时效果很好,但当我尝试运行时 python3.6 manage.py migrate

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/obrien98/webapps/core/lib/python3.6/Django-1.11.5-py3.6.egg/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/home/obrien98/webapps/core/lib/python3.6/Django-1.11.5-py3.6.egg/django/core/management/__init__.py", line 338, in execute
    django.setup()
  File "/home/obrien98/webapps/core/lib/python3.6/Django-1.11.5-py3.6.egg/django/__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/obrien98/webapps/core/lib/python3.6/Django-1.11.5-py3.6.egg/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/home/obrien98/webapps/core/lib/python3.6/Django-1.11.5-py3.6.egg/django/apps/config.py", line 94, in create
    module = import_module(entry)
  File "/usr/local/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 948, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'crispy_forms'