The current runner (ubuntu-24.04-x64) was detected as self-hosted because the platform does not match a GitHub-hosted runner image (or that image is deprecated and no longer supported). In such a case, you should install Ruby in the $RUNNER_TOOL_CACHE yourself, for example using https://github.com/rbenv/ruby-build You can take inspiration from this workflow for more details: https://github.com/ruby/ruby-builder/blob/master/.github/workflows/build.yml $ ruby-build 2.7.8 /opt/hostedtoolcache/Ruby/2.7.8/x64 Once that completes successfully, mark it as complete with: $ touch /opt/hostedtoolcache/Ruby/2.7.8/x64.complete It is your responsibility to ensure installing Ruby like that is not done in parallel.

Your workflow is using a version of actions/cache that is scheduled for deprecation, actions/cache@v2.1.3. Please update your workflow to use the latest version of actions/cache to avoid interruptions. Learn more: https://github.blog/changelog/2024-09-16-notice-of-upcoming-deprecations-and-changes-in-github-actions-services/

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

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/

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/