hw/vendor/lowrisc_ibex/doc/requirements.txt

setuptools_scm
# sphinxcontrib-wavedrom isn't yet ready for Sphinx 4. Relax this requirements
# once https://github.com/bavovanachte/sphinx-wavedrom/pull/32 is released.
sphinx~=3.0
sphinx_rtd_theme
sphinxcontrib-wavedrom
wavedrom>=1.9.0rc1