[~] # emerge -uvaND world
These are the packages that would be merged, in order:
Calculating world dependencies... done!
[blocks B ] dev-java/java-config-wrapper (is blocking dev-java/java-config-1.2.11-r1)
(...)
Total size of downloads: 212,423 kB
Portage overlays:
[1] /usr/local/portage
!!! Error: The above package list contains packages which cannot be installed
!!! at the same time on the same system.
[~] # emerge -C java-config-wrapper
--- Couldn't find 'java-config-wrapper' to unmerge.
>>> No packages selected for removal by unmerge.
[~] #