Unsigned android aab

Building my app works fine, but I need an unsigned app. Removing the credentials in the expo.dev console does not work. It always signs it automatically with some default keystore. I need it to be unsigned since we have a follow up process which needs an unsigned app.

What do I have to do to build an .aab file which is unsigned?

use withoutCredentials in your build profile eas.json - Expo Documentation