Generated focus.settings.gradle disappear on clean/rebuild

Plugin works great! But when trigger _clean_ or _rebuild_ (from Android Studio), all build directories will be removed. So generated `focus.settings.gradle` will be deleted and project will be broken (_.focus_ file exists, but points at nowhere now).
How do you solve that problem in your team?

As workaround I'm replacing path where generated `focus.settings.gradle` will be saved - select root folder of target project, which placed in focus.