For some reason github is returning 503 on our build servers randomly. And I need to checkout several repositories to build everything successfully. Builds are automatic and I don't want to maintain local mirror. And we wanted to release tomorrow (but were smart enough to promise this week). And on top of everything build takes six hours and sometime fails randomly even without github. But I'm still optimistic - it's Monday after all. We still have enough time to make it in time for Friday release :-)