On Thu, 31 Dec 2020 08:34:42 +0100, n952162 wrote: > Why do you specify -1?  That's the most common advice I get for avoiding > slot-conflicts, but I can't imagine a system without cups. To avoid adding to your world file. If a package needs to be in @world, it will already be there to -1 will be harmless. In the case of CUPS, you don't want it in world as it is a dependency of any program that wants to be able to print. -- Neil Bothwick Those who live by the sword get shot by those who don't.