Now required: https://docs.readthedocs.io/en/stable/config-file/v2.html#build-os
python3.9 -mvirtualenv sphinx . sphinx/bin/activate pip install Sphinx pip freeze > requirements.txt
This is specified both as best-practice to specify the defaults explicitly, and as required for updating sphinx from v1.8.5 Refs: https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html PR-URL: https://github.com/libuv/libuv/pull/3154 Reviewed-By: Colin Ihrig <cjihrig@gmail.com>