Possible compatibility issue with Sphinx 7.2.6?

[sr-murthy]

Describe the bug

context
I'm not sure whether this is a problem with sphinx_design, but I recently tried to Install sphinx_design with PDM
and Sphinx 7.2.6 pre-installed. This triggers an error.
expectation
Successfully install sphinx_design.

bug
I get the following error:

resolvelib.resolvers.InconsistentCandidate: Provided candidate <Candidate [email protected]> does not satisfy NamedRequirement(name='Sphinx', marker=None, extras=set(), specifier=<SpecifierSet('')>, editable=False, prerelease=False)

Reproduce the bug

Run the PDM add command to install sphinx_design as a dev. dependency (with Sphinx 7.2.6 already pre-installed in the venv):

pdm add -v --update-eager --no-editable --no-self --dev -G "docs" sphinx_design

Note: I'm using pyproject.toml in my project, and Sphinx is listed as a docs dev. dependency.

List your environment

Python 3.9.6 virtual environment.
PDM version 2.9.2
Sphinx 7.2.6
MacBook Pro 2020 (core i7)
MacOS Ventura 13.5.2

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[sr-murthy]

Follow up: when I downgraded Sphinx to 7.2.5 and tried to reinstall sphinx_design, with the same PDM command above, it worked.