Deployment / Deployment

Vercel Turbopack/Next.js TypeScript path alias resolution breaks in monorepos — Cannot find module

Fix Next.js/Turbopack monorepo type-check step failing for shared tsconfig base path aliases between webpack compilation and TypeScript checker Includes evidence for Deployment troubleshooting demand.

Source-backed Last updated May 20, 2026 1 source Needs local verification

Category: Deployment
Error signature: Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath)
Quick fix: Check the build output, project root, and deployment platform configuration before redeploying.
Updated: May 20, 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 Deployment, 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

Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath) is a Deployment failure pattern reported for developers trying to fix next.js/turbopack monorepo type-check step failing for shared tsconfig base path aliases between webpack compilation and typescript checker. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

GitHub vercel/next.js #93336 (closed, created 2026-04-29): TypeScript 6 path rewriting bug in Next.js getTypeScriptConfiguration causes baseUrl deletion without updating pathsBasePath. Webpack compilation succeeds but TypeScript type-check fails immediately after, breaking every path alias in shared base tsconfig. Affects deployed projects in monorepo architecture. Category: Deployment (Vercel/Next.js).

Common causes

GitHub vercel/next.js #93336 (closed, created 2026-04-29): TypeScript 6 path rewriting bug in Next.js getTypeScriptConfiguration causes baseUrl deletion without updating pathsBasePath. Webpack compilation succeeds but TypeScript type-check fails immediately after, breaking every path alias in shared base tsconfig. Affects deployed projects in monorepo architecture. Category: Deployment (Vercel/Next.js).

Quick fixes

Confirm the exact error signature matches Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath).
Check the Deployment 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 Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath) exactly before applying the quick fix.
Compare the failing environment with Deployment 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 Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath) mean in Deployment?

Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath) indicates the workflow described by "Vercel Turbopack/Next.js TypeScript path alias resolution breaks in monorepos — Cannot find module" failed in a Deployment context. Start by confirming the exact signature and the component that emitted it.

What should I check first for Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath)?

Check whether this cause matches your environment: GitHub vercel/next.js #93336 (closed, created 2026-04-29): TypeScript 6 path rewriting bug in Next.js getTypeScriptConfiguration causes baseUrl deletion without updating pathsBasePath. Webpack compilation succeeds but TypeScript type-check fails immediately after, breaking every path alias in shared base tsconfig. Affects deployed projects in monorepo architecture. Category: Deployment (Vercel/Next.js).

Is the Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath) guidance source-backed?

The "Vercel Turbopack/Next.js TypeScript path alias resolution breaks in monorepos — Cannot find module" 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 Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath)?

For "Vercel Turbopack/Next.js TypeScript path alias resolution breaks in monorepos — Cannot find module", 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 Type error: Cannot find module '@scope/shared-lib/index' or its corresponding type declarations. (getTypeScriptConfiguration: TypeScript 6 path rewriting deletes baseUrl but does not update pathsBasePath)?

For "Vercel Turbopack/Next.js TypeScript path alias resolution breaks in monorepos — Cannot find module", collect the failing Deployment command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.