Setuptools-scm unable to detect version

Hi,

My second question of the evening is for textproc/py-sphinext-opengrap.
Updating to the latest version fails to build (even outside poudriere) with

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Traceback (most recent call last):
File "<string>", line 1, in <module>
File "setup.py", line 6, in <module>
setuptools.setup(
File "/usr/local/lib/python3.9/site-packages/setuptools/__init__.py", line 87, in setup
return distutils.core.setup(**attrs)
File "/usr/local/lib/python3.9/site-packages/setuptools/_distutils/core.py", line 139, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 476, in __init__
_Distribution.__init__(
File "/usr/local/lib/python3.9/site-packages/setuptools/_distutils/dist.py", line 275, in __init__
self.finalize_options()
File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 900, in finalize_options
ep(self)
File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 920, in _finalize_setup_keywords
ep.load()(self, ep.name, value)
File "/usr/local/lib/python3.9/site-packages/setuptools_scm/integration.py", line 75, in version_keyword
_assign_version(dist, config)
File "/usr/local/lib/python3.9/site-packages/setuptools_scm/integration.py", line 51, in _assign_version
_version_missing(config)
File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 106, in _version_missing
raise LookupError(

LookupError: setuptools-scm was unable to detect version for /usr/ports/textproc/py-sphinxext-opengraph/work-py39/sphinxext-opengraph-0.7.5.

Make sure you're either building from a fully intact git repository or PyPI tarballs. Most other sources (such as GitHub's tarballs, a git checkout without the .git folder) don't contain the necessary metadata and will not work.
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It looks like a git repository should be used but there was not trouble for previous version.

Any idea would be much welcome !

Alexis