This is still present with linux-headers-4.19.0-10-amd64 and has broken at an upgrade from Stretch to Buster.
You can work around it by running dkms install spl/0.7.12 --kernelver=4.19.0-10-amd64 dkms install zfs/0.7.12 --kernelver=4.19.0-10-amd64 apt install --fix-broken This will force the correct dependency order and then resolve the configuration correctly in apt -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Kyle Robbertze ⢿⡄⠘⠷⠚⠋⠀ Debian Developer ⠈⠳⣄⠀⠀⠀⠀ https://wiki.debian.org/KyleRobbertze
