I still find very odd that $ dak rm -Rn python-setuptools-scm doesn't find anything though. dak is obviously aware of the package...
You missed -b for binary packages: $ dak rm -Rn -b python-setuptools-scm Will remove the following packages from unstable: python-setuptools-scm | 4.1.2-3 | allMaintainer: Debian Python Modules Team <python-modules-team@alioth-lists.debian.net>
------------------- Reason ------------------- ---------------------------------------------- Checking reverse dependencies... No dependency problem found. A RM bug for manual cruft removal of this arch:all package should fix it ... Andreas