/usr/lib/x86_64-linux-gnu/libblkmaker-0.1.so is in libblkmaker-0.1-dev 0.4.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libblkmaker-0.1.so.0.5.0
/usr/lib/x86_64-linux-gnu/libblkmaker-0.1.so.0.5.0