/usr/lib/x86_64-linux-gnu/libnmz.so is in libnmz7-dev 2.0.21-21.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnmz.so.7.1.3
/usr/lib/x86_64-linux-gnu/libnmz.so.7.1.3