Vercel / Deployment

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

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 Includes evidence for Vercel troubleshooting demand.

Source-backed Last updated May 21, 2026 1 source Needs local verification

Category: Deployment
Error signature: Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0)
Quick fix: Check the build output, project root, and deployment platform configuration before redeploying.
Updated: May 21, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Vercel, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

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

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).
Check the Vercel account, local tool state, and provider configuration involved in the failing workflow.
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

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

Diagnostic flow for this page

Match Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) exactly before applying the quick fix.
Compare the failing environment with Vercel versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) mean in Vercel?

Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) indicates the workflow described by "Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan" failed in a Deployment context. Start by confirming the exact signature and the component that emitted it.

What should I check first for Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0)?

Check whether this cause matches your environment: 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.

Is the Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0) guidance source-backed?

The "Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0)?

For "Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan", avoid applying "Check the build output, project root, and deployment platform configuration before redeploying." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging Production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan (@vercel/static-build@2.9.28, CLI 54.2.0)?

For "Vercel static-build production Vite build produces import.meta.env.DEV=true after vite.resolveConfig pre-scan", collect the failing Vercel command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.