createLazyFileRoute gets automatically replaced with createFileRoute (virtual file routes)

[PingvinB]

Which project does this relate to?

Router

Describe the bug

createLazyFileRoute gets forcibly replaced with createFileRoute on build.

Your Example Website or App

https://github.com/PingvinB/tanstack-router-virtual-lazy-demo

Steps to Reproduce the Bug or Issue

1. Clone linked repo
2. Change createFileRoute to createLazyFileRoute in either src/demo1/index.tsx or src/demo2/index.tsx
3. Run pnpm build

Expected behavior

I expected createLazyFileRoute to not be forcibly replaced with createFileRoute.

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.150
• OS: Windows
• Browser: N/A
• Browser Version: N/A
• Bundler: vite
• Bundler Version: 7.2.4

Additional context

I tried renaming index.ts to index.lazy.tsx as suggested in #4950, although, as I understand it, it shouldn't matter when using virtual file routes. Regardless, it didn't fix the issue.

[schiller-manuel]

virtual file routes don't support manual lazy right now. why do you need manual lazy? why not use automatic code splitting ?

[PingvinB]

virtual file routes don't support manual lazy right now

I see. Thanks for clarifying.

I wish however the plugin would have given a warning in this scenario.

why not use automatic code splitting ?

I'm implementing it in an existing application which doesn't lend itself too well to automatic code splitting.