running build
running build_py
creating build
creating build/lib
copying pep621.py -> build/lib
Running Sphinx v4.3.2
making output directory... done

Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/sphinx/cmd/build.py", line 276, in build_main
    app = Sphinx(args.sourcedir, args.confdir, args.outputdir,
  File "/usr/lib/python3.10/site-packages/sphinx/application.py", line 270, in __init__
    self._init_builder()
  File "/usr/lib/python3.10/site-packages/sphinx/application.py", line 328, in _init_builder
    self.builder.init()
  File "/usr/lib/python3.10/site-packages/sphinx/builders/html/__init__.py", line 220, in init
    self.init_templates()
  File "/usr/lib/python3.10/site-packages/sphinx/builders/html/__init__.py", line 268, in init_templates
    self.theme = theme_factory.create(themename)
  File "/usr/lib/python3.10/site-packages/sphinx/theming.py", line 245, in create
    raise ThemeError(__('no theme named %r found (missing theme.conf?)') % name)
sphinx.errors.ThemeError: no theme named 'furo' found (missing theme.conf?)

Theme error:
no theme named 'furo' found (missing theme.conf?)
==> ERROR: A failure occurred in build().
    Aborting...