Integration scaffold aborts with domain device_tracker

I’m trying to create a new Home Assistant integration. The scaffold stops with a success message after the domain I entered (device_tracker) without any files created. Other domains get more questions.
Any pointer what could be wrong?
the dev branch is up to date.

vscode/workspaces/home-assistant-core (dev) $ python3-m script.scaffold integration
What is the domain? > device_tracker
Running hassfest to pick up new information.
Running gen_requirements_all to pick up new information.
Running script/translations_develop to pick up new translation strings.
Integration code has been generated
The next step is to look at the files and deal with all areas marked as TODO.