Translations:Upgrade Instructions/1.2-release/4/en

   Note

You may be wondering -- what are these packages on my system that are not part of the world set? They could be a number of things. First, they could be build dependencies for certain packages. They could possibly be old slots of packages you already use -- for example, an old version of PHP. The could also be packages that were dependencies of certain packages, but are no longer needed by those packages -- possibly due to changes in USE flags. Often, virtuals are part of this group of packages, and it is generally safe for virtuals to be removed. They will get re-emerged in the future if referenced by an ebuild.