Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan

What this error means

Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) is a Vercel failure pattern reported for developers trying to developer deploying vite app to vercel finds production build incorrectly has import.meta.env.dev=true instead of false — causes dev-only code to ship to production. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

GitHub Issue #16380 on vercel/vercel opened today (May 21, 2026) by sunupupup. Specific to @vercel/static-build@2.9.28 with CLI 54.2.0. Build-time env variable DEV should be false in production but Vite’s resolveConfig pre-scan fails to set it correctly. This is a production-relevant bug that could leak debug-only code to users.

Common causes

• GitHub Issue #16380 on vercel/vercel opened today (May 21, 2026) by sunupupup. Specific to @vercel/static-build@2.9.28 with CLI 54.2.0. Build-time env variable DEV should be false in production but Vite’s resolveConfig pre-scan fails to set it correctly. This is a production-relevant bug that could leak debug-only code to users.

Quick fixes

1. Confirm the exact error signature matches Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0).
2. Check the Vercel account, local tool state, and provider configuration involved in the failing workflow.
3. Check the build output, project root, and deployment platform configuration before redeploying.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/vercel/vercel/issues/16380

Evidence note: GitHub Issue #16380 on vercel/vercel opened today (May 21, 2026) by sunupupup. Specific to @vercel/static-build@2.9.28 with CLI 54.2.0. Build-time env variable DEV should be false in production but Vite’s resolveConfig pre-scan fails to set it correctly. This is a production-relevant bug that could leak debug-only code to users.

Related errors

• Deployment

FAQ

What should I check first?

Start with the exact Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed Vercel workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0).