Description of problem:

vdirsyncer will not work at fedora 35

Version-Release number of selected component (if applicable):

0.16.8

How reproducible:

run vdirsyncer against a configured CardDAS/CalDAV source.

Steps to Reproduce:
1. vdirsyncer sync

Actual results:

[ulf@x1 ~]$ vdirsyncer sync
error: Unknown error occurred: unmatched ')' (<string>, line 1)
error: Use `-vdebug` to see the full traceback.
[ulf@x1 ~]$ vdirsyncer -vdebug sync
debug: Using 1 maximal workers.
error: Unknown error occurred: unmatched ')' (<string>, line 1)
error: Use `-vdebug` to see the full traceback.
debug:   File "/usr/lib/python3.10/site-packages/vdirsyncer/cli/__init__.py", line 30, in inner
debug:     f(*a, **kw)
debug:   File "/usr/lib/python3.10/site-packages/vdirsyncer/cli/__init__.py", line 145, in sync
debug:     with wq.join():
debug:   File "/usr/lib64/python3.10/contextlib.py", line 135, in __enter__
debug:     return next(self.gen)
debug:   File "/usr/lib/python3.10/site-packages/vdirsyncer/cli/utils.py", line 364, in join
debug:     with ui_worker.patch_click():
debug:   File "/usr/lib64/python3.10/contextlib.py", line 135, in __enter__
debug:     return next(self.gen)
debug:   File "/usr/lib/python3.10/site-packages/click_threading/__init__.py", line 144, in patch_click
debug:     with patch_ui_functions(wrapper):
debug:   File "/usr/lib64/python3.10/contextlib.py", line 135, in __enter__
debug:     return next(self.gen)
debug:   File "/usr/lib/python3.10/site-packages/click_threading/monkey.py", line 50, in patch_ui_functions
debug:     stub_f = eval('lambda {s}: {n}._real_click_fn({a})'

Expected results:

a sucessful sync

Additional info:

A installation of vdirsyncer using pip will work as expected:
[ulf@x1 ~]$ .venv/vdirsyncer/bin/pip freeze
atomicwrites==1.4.0
certifi==2021.10.8
charset-normalizer==2.0.7
click==8.0.3
click-log==0.3.2
click-threading==0.5.0
idna==3.3
requests==2.26.0
requests-toolbelt==0.9.1
urllib3==1.26.7
vdirsyncer==0.18.0