/usr/lib/x86_64-linux-gnu/libmia2d-2.4.so is in libmia-2.4-dev 2.4.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmia2d-2.4.so.6
/usr/lib/x86_64-linux-gnu/libmia2d-2.4.so.6