localhost ~ # whoami
root
localhost ~ # FEATURES="-usersandbox -userpriv" emerge taspring-linux-svn
Calculating dependencies... done!
>>> Emerging (1 of 1) games-strategy/taspring-linux-svn-0.72-r2 to /
>>> checking ebuild checksums ;-)
>>> checking auxfile checksums ;-)
>>> checking miscfile checksums ;-)
>>> checking taspring-linux-data-0.72b1.tar.bz2 ;-)
>>> Unpacking source...
ACCESS DENIED  mkdir:     /usr/portage/distfiles/svn-src
mkdir: cannot create directory `/usr/portage/distfiles/svn-src': Permission denied

!!! ERROR: games-strategy/taspring-linux-svn-0.72-r2 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_unpack
  ebuild.sh, line 711:   Called src_unpack
  taspring-linux-svn-0.72-r2.ebuild, line 49:   Called subversion_src_unpack
  subversion.eclass, line 272:   Called subversion_fetch
  subversion.eclass, line 158:   Called die

!!! subversion.eclass: can't mkdir /usr/portage/distfiles/svn-src.
!!! If you need support, post the topmost build error, and the call stack if relevant.

--------------------------- ACCESS VIOLATION SUMMARY ---------------------------
LOG FILE = "/var/log/sandbox/sandbox-games-strategy_-_taspring-linux-svn-0.72-r2-17925.log"

mkdir:     /usr/portage/distfiles/svn-src
--------------------------------------------------------------------------------
!!! This ebuild is from an overlay: '/usr/local/portage'
localhost ~ #