Dennis Ostendorf


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Posted in What's New In Ruby 3.3 Discussion

This might be because you don't have Rust installed.

If so, first uninstall your Ruby 3.3.0, then install Rust (, and then re-install Ruby 3.3.0.

Now RUBY_YJIT_ENABLE=1 ruby -v should show you that it's using YJIT (this worked for me using rbenv)