c600 src # emerge --unmerge =sys-kernel/gentoo-sources-2.4.28-r5

 sys-kernel/gentoo-sources
    selected: 2.4.28-r5
   protected: none
     omitted: 2.4.28-r7 2.6.11-r6 2.6.14-r2 2.6.11-r9 2.6.12-r10 2.6.14-r4 2.6.14-r5 2.6.15-r1 2.6.16-r7 2.6.17-r4

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

>>> Waiting 5 seconds before starting...
>>> (Control-C to abort)...
>>> Unmerging in: 5 4 3 2

Exiting on signal 2