libblockdev currently depends on a lot of really odd stuff. For example: btrfs-progs, dosfstools, mdadm, lvm2, dmraid, etc. This means that, for libblockdev to be installed properly and function, things like btrfs-progs must also be installed, even if the user does not use any of these packages on their system. Consider evaluating and removing any unneeded dependencies. This is especially important since libblockdev is required by udisks2, which is in turn required by quite a bit of software.