@tanstack/router-cli@1.166.35 generate fails with newest 1.66.36 version

[codeart1st]

Which project does this relate to?

Router

Describe the bug

We use @tanstack/router-cli generate in our library project to generate the types without calling vite. Since last weekend the job fails:

> npx -y @tanstack/router-cli@1.166.36 generate

Error: Cannot find module '@/constants'
Require stack:
- /home/[...]/routes.config.ts
    at /home/[...]/.npm/_npx/b068e050d756338e/node_modules/@tanstack/router-generator/dist/cjs/generator.cjs:131:13
    at async Object.generate (/home/[...]/.npm/_npx/b068e050d756338e/node_modules/@tanstack/router-cli/dist/cjs/generate.cjs:6:3)
    at async /home/[...]/.npm/_npx/b068e050d756338e/node_modules/@tanstack/router-cli/dist/cjs/index.cjs:13:3

The problem occurs since 1.166.36.

Your Example Website or App

https://stackblitz.com/edit/github-2bhm9xj2?file=package.json

Steps to Reproduce the Bug or Issue

• npm run types:tanstack -> fails
• switch to version 1.166.35
• npm run types:tanstack -> succeded

routes.config.ts:

import {
  // ...
} from '@/constants'
import { rootRoute, index, route, layout } from '@tanstack/virtual-file-routes'

export default rootRoute('app/routes/root.ts', [
  // ...
])

tsconfig.json

  "compilerOptions": {
    "paths": {
      "@/*": [
        "./lib/*"
      ]
    }
  },

Expected behavior

@tanstack/router-cli@1.166.36 works the same as @tanstack/router-cli@1.166.35.

Screenshots or Videos

No response

Platform

• Bundler: vite
• Bundler Version: 8.0.8
• TypeScript: 5.9.3

Additional context

No response

[codeart1st]

Now the @tanstack/router-plugin is also affected for me, because the underlying issue is inside of @tanstack/router-generator

@tanstack/router-plugin@1.167.26 works - @tanstack/router-plugin@1.167.27 breaks