/usr/lib/x86_64-linux-gnu/libmeep_mpi-default.so.8 is in libmeep-mpi-default8 1.3-3build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmeep_mpi-default.so.8.0.0
/usr/lib/x86_64-linux-gnu/libmeep_mpi-default.so.8.0.0