emerge system
Calculating system dependencies... done!
>>> starting parallel fetching
>>> Emerging (1 of 105) sys-devel/gettext-0.16.1 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking gettext-0.16.1.tar.gz ;-)
>>> Unpacking source...
>>> Unpacking gettext-0.16.1.tar.gz to /var/tmp/portage/gettext-0.16.1/work
 * Removing useless C++ checks ...                 [ ok ]
 * Applying gettext-0.14.1-lib-path-tests.patch .  [ ok ]
 * Applying gettext-0.14.2-fix-race.patch ...      [ ok ]
 * Applying gettext-0.15-expat-no-dlopen.patch ..  [ ok ]
touch: setting times of `/var/tmp/portage/gettext-0.16.1/.unpacked': Function not implemented

!!! ERROR: sys-devel/gettext-0.16.1 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/gettext-0.16.1
!!! If you need support, post the topmost build error, and the call stack if relevant.