{
    'regex' => qr/^\/a\/.*?\/b\/.*\/pkgs\/([^\/]*)?\/([^\/]*)?\/.*/
}

##</code><code>##

print("Regex: $regex\n");

##</code><code>##

Regex: ?^:^/nfs/.*?/itools/.*/pkgs/([^\/]*)?/([^\/]*)?/.*/)