Ping! ABI issues have long since been addressed (per your pre-Buster request), and we're approaching Bullseye freeze. Thus, another ping: could you please apply this one-line patch?
This dependency (default-logind | logind) is a part of official Policy, as of version 4.4.0. Because of udisks2's position on desktop environments dependency chains, the no-alternative dependency on libpam-systemd makes many unrelated packages uninstallable, even on installs that don't use any of udisks2's functionality (like, I use it on my laptops but not desktops). This can be worked around with libpam-elogind-compat, but that's an experimental-only hack that was explicitely described as not supposed to ever reach a release. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ .--[ Makefile ] ⣾⠁⢠⠒⠀⣿⡁ # beware of races ⢿⡄⠘⠷⠚⠋⠀ all: pillage burn ⠈⠳⣄⠀⠀⠀⠀ `----