[gentoo-embedded] GNAP: Build extensions using gnap_make

[Jesus Gomez]

Hello, 

I'm trying to build a gnap extension (psad), some of the dependencies required by PSAD are masked.
(masked by: EAPI 2, invalid: SLOT is undefined)

I added dependencies to portage overlay directory, I created a new portagesnapshot unmasking sys-apps/portage in profiles/package.mask and then I executed: 

sudo gnap_make -t stage3 -t extensions -s stage2-x86-hardened-2008.0.tar.bz2 -e myspecs/ -v arcturus09c -o portage -p ../mygnap-portagesnapshot-2.0.tar.bz2

How can I invoke gnap_make to use a newer version of portage ? Is 'chroot /var/tmp/catalyst/tmp/gnap/stage3-x86-arcturus09c' required ?

Thanks,