Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [+ /usr/bin/python3 -Bs /usr/lib/rpm/redhat/pyproject_buildrequires.py --generate-extras --python3_pkgversion 3 --wheeldir /builddir/build/BUILD/python-music21-9.5.0-build/music21-9.5.0/pyproject-wheeldir --output /builddir/build/BUILD/python-music21-9.5.0-build/python-music21-9.5.0-1.fc43.x86_64-pyproject-buildrequires -t]: [This snipped describes an invocation to generate build requirements for the package from the built wheel metadata. It contains a flag "-t" which adds the tox configuration to the build.]
=============
[LookupError: tox configuration not found. To use tox, please ensure tox configuration is located in current directory (in tox.ini, setup.cfg, pyproject.toml, or tox.toml). See https://tox.wiki/en/latest/config.html for details.]: [The tox configuration file couldn't be located, hence the LookupError is raised.]

Issue: The package configures fetching additional test build requirements from tox configuration, but it doesn't provide a configuration file from which it's possible to read the requirements.
Resolution: It should be ensured that tox configuration file is present in the sdist. If the package doesn't use tox, the "-t" flag from the generate_buildrequires.py invocation should be removed.