/usr/lib/x86_64-linux-gnu/libmirisdr.so is in libmirisdr-dev 0.0.4.59ba37-5+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmirisdr.so.0
/usr/lib/x86_64-linux-gnu/libmirisdr.so.0