$ ebuild cheesetracker-0.9.1.ebuild unpack $ cd /usr/tmp/portage/cheesetracker-0.9.1/work/cheesetracker-0.9.1 $ /usr/lib/portage/bin/sandbox $ scons . You can get the cheesetracker ebuild from the blocked bug
I added scons-0.94-r2 to the repository which should fix your sandbox errors.