Deprecation warnings in the build process

[jan1034]

python setup.py build_ext
TOBIAS/setup.py:11: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
!!

    ********************************************************************************
    Requirements should be satisfied by a PEP 517 installer.
    If you are using pip, you can try `pip install --use-pep517`.

    This deprecation is overdue, please update your project and remove deprecated
    calls to avoid build errors in the future.
    ********************************************************************************

!!
dist.Distribution().fetch_build_eggs(['numpy'])
.conda/envs/pypi/lib/python3.14/site-packages/setuptools/init.py:92: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
!!

    ********************************************************************************
    Requirements should be satisfied by a PEP 517 installer.
    If you are using pip, you can try `pip install --use-pep517`.

    This deprecation is overdue, please update your project and remove deprecated
    calls to avoid build errors in the future.
    ********************************************************************************

!!
dist.fetch_build_eggs(dist.setup_requires)
.conda/envs/pypi/lib/python3.14/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
!!

    ********************************************************************************
    Please consider removing the following classifiers in favor of a SPDX license expression:

    License :: OSI Approved :: MIT License

    See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
    ********************************************************************************

!!
self._finalize_license_expression()
running build_ext

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