Hi to all involved, I am very sorry to have caused all those issues and promise to test change requests more careful in the future.
Helmut, thank you for the review offer and I take it. Here is my draft that I have tested: https://salsa.debian.org/debian/debianutils/-/merge_requests/27 I am not very sure if I have to add any cleanup for the missing DPKG_ROOT. In my testing there was no problem but obviously I do not know about every possible scenario that is involved here. Thanks, Bastian