broofa/node-uuid — comment on commit 42285edef9cadfd39d9b01b395ea466e84a4ffde
File: uuid.js line 154
By broofa:

(options.nsecs !== undefined && _count > 0)

As per my commit note, fundamentally I believe that if you specify an option, you should be guaranteed to get an ID with that value in the corresponding field of the UUID. (Note, too, that since we no longer have _count, this makes even less sense. :) )