Claude Code Ruby Issues

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Thursday, January 29, 2026

Users are reporting issues with running Ruby 3.3 and Bundler 4.0 on Claude Code web, specifically encountering "bundle exec fail" errors.

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@tk0miyatk0miya

It seems like you're not the only one running into this — quite a few people are seeing bundle exec fail when running Ruby 3.3 + Bundler 4.0 on Claude Code (web). The combination appears to be somewhat unstable right now, especially with how the container environment handles

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