Source distribution tarballs on pypi do not contain README.md, causing hatch-fancy-pypi-readme plugin to fail

[charles-dyfis-net]

The source distributions published to pypi presently cannot be built; attempts fail with:

Processing /private/tmp/nix-build-python3.12-anthropic-0.25.7.drv-0/anthropic-0.25.7
  Running command Preparing metadata (pyproject.toml)
  Traceback (most recent call last):
    File "/nix/store/brnl7k3jxym5gyla9yh05xz5c4vhn1rz-python3.12-pip-23.2.1/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
      main()
    File "/nix/store/brnl7k3jxym5gyla9yh05xz5c4vhn1rz-python3.12-pip-23.2.1/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/nix/store/brnl7k3jxym5gyla9yh05xz5c4vhn1rz-python3.12-pip-23.2.1/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 152, in prepare_metadata_for_build_wheel
      whl_basename = backend.build_wheel(metadata_directory, config_settings)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/build.py", line 56, in build_wheel
      return os.path.basename(next(builder.build(wheel_directory, ['standard'])))
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/builders/plugin/interface.py", line 93, in build
      self.metadata.validate_fields()
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/metadata/core.py", line 243, in validate_fields
      _ = self.version
          ^^^^^^^^^^^^
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/metadata/core.py", line 128, in version
      self._version = self._get_version()
                      ^^^^^^^^^^^^^^^^^^^
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/metadata/core.py", line 222, in _get_version
      core_metadata = self.core
                      ^^^^^^^^^
    File "/nix/store/w6r9jmj192v8mwga0zll0wq0kw02xnvn-python3.12-hatchling-1.18.0/lib/python3.12/site-packages/hatchling/metadata/core.py", line 174, in core
      metadata_hook.update(self.core_raw_metadata)
    File "/nix/store/k3bq3xc58ajs29rlwcxyi1mi309wl3p7-python3.12-hatch-fancy-pypi-readme-23.1.0/lib/python3.12/site-packages/hatch_fancy_pypi_readme/hooks.py", line 24, in update
      config = load_and_validate_config(self.config)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/nix/store/k3bq3xc58ajs29rlwcxyi1mi309wl3p7-python3.12-hatch-fancy-pypi-readme-23.1.0/lib/python3.12/site-packages/hatch_fancy_pypi_readme/_config.py", line 56, in load_and_validate_config
      raise ConfigurationError(errs)
  hatch_fancy_pypi_readme.exceptions.ConfigurationError: ["Fragment file 'README.md' not found."]
  error: subprocess-exited-with-error

  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> See above for output.

Inspecting the tarball to list non-.py content shows only:

$ tar -tzf anthropic-0.25.7.tar.gz | grep -v '[.]py'
anthropic-0.25.7/src/anthropic/py.typed
anthropic-0.25.7/src/anthropic/tokenizer.json
anthropic-0.25.7/src/anthropic/lib/.keep
anthropic-0.25.7/.gitignore
anthropic-0.25.7/LICENSE
anthropic-0.25.7/pyproject.toml
anthropic-0.25.7/PKG-INFO

Notably, there is indeed no README.md file present.