(chroot) livecd portage-2.1.1 # emerge -v portage
Calculating dependencies... done!
>>> Emerging (1 of 1) sys-apps/portage-2.1.1 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking portage-2.1.1.tar.bz2 ;-)
>>> Unpacking source...
>>> Unpacking portage-2.1.1.tar.bz2 to /var/tmp/portage/portage-2.1.1/work
touch: setting times of `/var/tmp/portage/portage-2.1.1/.unpacked': Function not implemented

!!! ERROR: sys-apps/portage-2.1.1 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_unpack
  ebuild.sh, line 712:   Called die

!!! IO Failure -- Failed 'touch .unpacked' in /var/tmp/portage/portage-2.1.1
!!! If you need support, post the topmost build error, and the call stack if relevant.