[gentoo-user] re: emerge --depclean [gentoo-sources]

[Alexander Kapshuk <alexander.kapshuk@gmail.com>]

emerge --depclean wants to remove the gentoo-sources for my old kernel
[sys-kernel/gentoo-sources-3.8.13] which I want to hang on to for the
time being.

Is there a way to instruct emerge not to remove them?

emerge(1)
Packages that are part of the world set will always be kept. They can be
manually added to this  set  with  emerge --noreplace <atom>.

If I understood the instruction above, 'emerge --noreplace
sys-kernel/gentoo-sources-3.8.13' should have added 'gentoo-sources' to
/var/lib/portage/world_sets, which it didn't seem to do.

box0 src # emerge --noreplace sys-kernel/gentoo-sources-3.8.13
!!! 'sys-kernel/gentoo-sources-3.8.13' is not a valid package atom.
!!! Please check ebuild(5) for full details.


box0=; ls -l `pwd`/world*
-rw-r--r-- 1 root portage 920 Sep 20 20:45 /var/lib/portage/world
-rw-r--r-- 1 root portage   0 Sep 20 20:45 /var/lib/portage/world_sets

Or is it a matter of defining something like this:
CONFIG_PROTECT_MASK="/usr/src/linux-3.8.13-gentoo"
in /etc/portage/make.conf?


Any pointers would be much appreciated.