Fixing the “CPU Lacks AVX Support” Error for Claude CLI
Have you ever faced a sudden halt in your workflow due to a cryptic error? If you’re using Claude CLI on a remote VPS, you might have encountered the frustrating “CPU lacks AVX support” message, leading to a crash.
“Your workflow just stopped. No warning. No gradual degradation.”
This issue arose recently as Claude CLI transitioned to a new runtime called Bun, which requires AVX (Advanced Vector Extensions) support—often unavailable on many virtualized environments. Fortunately, there’s a simple workaround.
Quick Steps to Fix:
- Remove the broken installation: Clean up any existing Claude files.
- Check Node.js version: Ensure it’s 18 or higher.
- Install via npm: Use Node.js instead of Bun to bypass the AVX issue.
- Prevent auto-updates: Set environment variables to avoid future disruptions.
Why This Matters
Understanding the unique constraints of remote VPS environments can save you time and headaches in the future. By leveraging npm, you can maintain stability while waiting for future fixes from Anthropic.
Do you want to dive deeper into troubleshooting or share your experiences? Explore the full article for all the details and community tips!
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