I've noticed lately on the ML that people have been talking about using package sets, such as @world and @installed. I figured it was a part of portage 2.1.6* since using @world with 2.1.4* would result in an error message about an invalid package atom. However, after upgrading to portage 2.1.6.4, I still get the same error when doing something like 'emerge -up @world'.
What are these package sets? What is the difference between 'emerge -up world' and 'emerge -up @world'? Why don't these package sets ever work for me? Thanks, Chris
