libfilesys-notify-simple-perl 0.12-1 (amd64 binary) in ubuntu bionic

 Filesys::Notify::Simple is a Perl module that provides a simple and unified
 interface to get notifications of changes for a given filesystem path. It can
 use inotify2 on Linux or fsevents on Mac OS X, kqueue on FreeBSD,
 FindFirstChangeNotification on Windows and otherwise falls back to a full
 directory scan.