Running `vaadin:generate` in project with old `/frontend` will generate in `src/main`

[cromoteca]

Describe the bug

I've executed the command mvn compile vaadin:generate in a project that uses the old /frontend directory and generated files go in src/main/frontend as in the new directory layout. This is clearly related to the new EngineConfiguration. Running the application doesn't lead to the same error, so the problem is in the generate goal.

Expected-behavior

No response

Reproduction

As described

System Info

Version 24.7-SNAPSHOT (as of Hilla alpha8)