/usr/lib/libFSNode.so.0 is in gworkspace.app 0.9.3-1+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/GNUstep/Frameworks/FSNode.framework/Versions/0/libFSNode.so.0
/usr/lib/GNUstep/Frameworks/FSNode.framework/Versions/0/libFSNode.so.0