I see pkgs/servers/xmpp/openfire/3.5.2.nix does: rm -r $out/logs ln -s /var/log/openfire $out/log I can see this can be useful. However, if one is installing nix as non-root this will fail. Is it more logical to use something like: rm -r $out/logs ln -s /nix/log/openfire $out/log ?? Is this a bad idea? Pj.