XPUALVIL0050 ~ # cat /etc/portage/package.mask | grep sources
sys-kernel/gentoo-sources:2.6.36
XPUALVIL0050 ~ # eselect kernel list
Available kernel symlink targets:
  [1]   linux-2.6.35-gentoo-r11 *
  [2]   linux-2.6.36-gentoo
XPUALVIL0050 ~ # emerge -pc

 * Depclean may break link level dependencies. Thus, it is
 * recommended to use a tool such as `revdep-rebuild` (from
 * app-portage/gentoolkit) in order to detect such breakage.
 *
 * Always study the list of packages to be cleaned for any obvious
 * mistakes. Packages that are part of the world set will always
 * be kept.  They can be manually added to this set with
 * `emerge --noreplace <atom>`.  Packages that are listed in
 * package.provided (see portage(5)) will be removed by
 * depclean, even if they are part of the world set.
 *
 * As a safety measure, depclean will not remove any packages
 * unless *all* required dependencies have been resolved.  As a
 * consequence, it is often necessary to run `emerge --update
 * --newuse --deep @world` prior to depclean.

Calculating dependencies... done!
>>> Calculating removal order...

>>> These are the packages that would be unmerged:

 sys-kernel/gentoo-sources
    selected: 2.6.35-r11
   protected: none
     omitted: 2.6.36

All selected packages: sys-kernel/gentoo-sources-2.6.35-r11

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Packages installed:   719
Packages in world:    120
Packages in system:   50
Required packages:    718
Number to remove:     1
XPUALVIL0050 ~ #