/usr/lib/x86_64-linux-gnu/dirsrv/libnunc-stans.so.0 is in 389-ds-base-libs 1.3.7.10-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/dirsrv/libnunc-stans.so.0.1.0
/usr/lib/x86_64-linux-gnu/dirsrv/libnunc-stans.so.0.1.0