devel/py-setuptools-scm does not build, if devel/py-setuptools_scm7 installed

This happens to devel/py-setuptools-scm, if devel/py-setuptools_scm7 is 
installed:


===>  Building for py311-setuptools-scm-8.0.4
* Getting build dependencies for wheel...
Traceback (most recent call last):
   File 
"/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", 
line 373, in <module>
     main()
   File 
"/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", 
line 357, in main
     json_out["return_val"] = hook(**hook_input["kwargs"])
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", 
line 134, in get_requires_for_build_wheel
     return hook(config_settings)
            ^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 
177, in get_requires_for_build_wheel
     return self._get_build_requires(
            ^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 
159, in _get_build_requires
     self.run_setup()
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 
174, in run_setup
     exec(compile(code, __file__, 'exec'), locals())
   File "setup.py", line 1, in <module>
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/__init__.py", line 
87, in setup
     return distutils.core.setup(**attrs)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/_distutils/core.py", 
line 139, in setup
     _setup_distribution = dist = klass(attrs)
                                  ^^^^^^^^^^^^
   File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", 
line 476, in __init__
     _Distribution.__init__(
   File 
"/usr/local/lib/python3.11/site-packages/setuptools/_distutils/dist.py", 
line 275, in __init__
     self.finalize_options()
   File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", 
line 899, in finalize_options
     for ep in sorted(loaded, key=by_order):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", 
line 898, in <lambda>
     loaded = map(lambda e: e.load(), filtered)
                            ^^^^^^^^
   File "/usr/local/lib/python3.11/importlib/metadata/__init__.py", line 
204, in load
     return functools.reduce(getattr, attrs, module)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'setuptools_scm.integration' has no attribute 
'infer_version'

ERROR Backend subprocess exited when trying to invoke 
get_requires_for_build_wheel
*** Error code 1



Vice versa, if devel/py-setuptools-scm is installed, 
devel/py-setuptools_scm7 has a conflict:

Installing py311-setuptools_scm7-7.1.0...
pkg-static: py311-setuptools_scm7-7.1.0 conflicts with 
py311-setuptools-scm-8.0.4 (installs files into the same place). 
Problematic file: 
/usr/local/lib/python3.11/site-packages/setuptools_scm/__init__.py
*** Error code 1



Any ideas? I really need both installed because of dependencies, scm 
v7.1.0 and v8.0.4.

Thanks for any hint.

Best wishes,
Rainer