slack-bolt==0.2.1a0
slack-sdk==3.0.0a3

Python 3.7.7

ProductName:	Mac OS X
ProductVersion:	10.15.6
BuildVersion:	19G73
Darwin Kernel Version 19.6.0: Sun Jul  5 00:43:10 PDT 2020; root:xnu-6153.141.1~9/RELEASE_X86_64

cd samples/aws_chalice
cp -p .chalice/config.json.simple .chalice/config.json
# edit .chalice/config.json to change environment variables.
cp -p app.py app.py.org
cp -p simple_app.py app.py
sh deploy.sh

# bolt_app.command("/hello-bolt-python-chalice")(
#     ack=respond_to_slack_within_3_seconds, subsequent=[can_be_long],
# )

Traceback (most recent call last):
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/cli/__init__.py", line 636, in main
    return cli(obj={})
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/cli/__init__.py", line 206, in deploy
    deployed_values = d.deploy(config, chalice_stage_name=stage)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/deploy/deployer.py", line 354, in deploy
    return self._deploy(config, chalice_stage_name)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/deploy/deployer.py", line 360, in _deploy
    self._validate_config(config)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/deploy/deployer.py", line 383, in _validate_config
    validate_configuration(config)
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/deploy/validate.py", line 40, in validate_configuration
    routes = config.chalice_app.routes
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/config.py", line 141, in chalice_app
    app = v()
  File "/Users/ota/Documents/python/bolt-python/venv/lib/python3.7/site-packages/chalice/cli/factory.py", line 275, in load_chalice_app
    app = importlib.import_module('app')
  File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/ota/Documents/python/bolt-python/samples/aws_chalice/app.py", line 39, in <module>
    ack=respond_to_slack_within_3_seconds, subsequent=[can_be_long],
TypeError: __call__() got an unexpected keyword argument 'ack'