The above gives

https://github.com/boostorg/python/actions/runs/23999475219/job/69993078166?pr=513#step:5:28

Run lukka/run-vcpkg@v6
Warning: The save-state command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

This is already fixed in upstream (lukka/run-vcpkg#168); the latest version is v11—I’m not sure why v8 and v9 are skipped though.