/usr/lib/x86_64-linux-gnu/libxneur.so is in libxneur-dev 0.20.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxneur.so.20.0.0
/usr/lib/x86_64-linux-gnu/libxneur.so.20.0.0