I checked policy to make sure, and there is no maintainer script from the new package which is called between unpack and the old postrm; it seems to me that the only way is to patch the old postrm in the new preinst. :-/
I checked policy to make sure, and there is no maintainer script from the new package which is called between unpack and the old postrm; it seems to me that the only way is to patch the old postrm in the new preinst. :-/