the development-sources-2.6.0 doesn't set the virtual/linux-sources, when i want to emerge the latest nvidia-kernel-1.0.5328 it wants to merge sys-kernel/gentoo-dev-sources-2.6.0 while the development-sources-2.6.0 are merged
Check /var/cache/edb/virtuals and remove the reference to gentoo-dev-sources.
thx, changing virtual/linux-sources sys-kernel/gentoo-dev-sources sys-kernel/vanilla-sources sys-kernel/development-sources sys-kernel/gaming-sources by virtual/linux-sources sys-kernel/development-sources sys-kernel/gentoo-dev-sources sys-kernel/vanilla-sources sys-kernel/gaming-sources did the trick