Было при запуске в Консоли программы cobang

Traceback (most recent call last):
  File "/usr/lib64/python3.8/runpy.py", line 185, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/usr/lib64/python3.8/runpy.py", line 144, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/usr/lib64/python3.8/runpy.py", line 111, in _get_module_details
    __import__(pkg_name)
  File "/usr/lib/python3.8/site-packages/cobang/__init__.py", line 5, in <module>
    from single_version import get_version
ModuleNotFoundError: No module named 'single_version'

после установки
python3-single-version
python3-kiss-headers
python3-logbook
стало так:

Traceback (most recent call last):
  File "/usr/lib64/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib64/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.8/site-packages/cobang/__main__.py", line 21, in <module>
    from .app import CoBangApplication
  File "/usr/lib/python3.8/site-packages/cobang/app.py", line 11, in <module>
    import zbar
ModuleNotFoundError: No module named 'zbar'

после установки python-zbar (и даже всех zbar тоже) стало так:

Traceback (most recent call last):
  File "/usr/lib64/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib64/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.8/site-packages/cobang/__main__.py", line 37, in <module>
    main()
  File "/usr/lib/python3.8/site-packages/cobang/__main__.py", line 32, in main
    app = CoBangApplication()
  File "/usr/lib/python3.8/site-packages/cobang/app.py", line 84, in __init__
    application_id=APP_ID, flags=Gio.ApplicationFlags.DEFAULT_FLAGS,
AttributeError: type object 'ApplicationFlags' has no attribute 'DEFAULT_FLAGS'
