$ emerge -av portage

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] sys-apps/portage-2.2.00.13405  USE="-build -doc -epydoc -prefix-chaining (-selinux)" LINGUAS="-pl" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No]

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) sys-apps/portage-2.2.00.13405
 * prefix-portage-2.2.00.13405.tar.bz2 RMD160 SHA1 SHA256 size ;-) ...                                                                 [ ok ]
 * checking ebuild checksums ;-) ...                                                                                                   [ ok ]
 * checking auxfile checksums ;-) ...                                                                                                  [ ok ]
 * checking miscfile checksums ;-) ...                                                                                                 [ ok ]
>>> Unpacking source...
>>> Unpacking prefix-portage-2.2.00.13405.tar.bz2 to /gentoo/var/tmp/portage/sys-apps/portage-2.2.00.13405/work
>>> Source unpacked in /gentoo/var/tmp/portage/sys-apps/portage-2.2.00.13405/work
>>> Compiling source in /gentoo/var/tmp/portage/sys-apps/portage-2.2.00.13405/work/prefix-portage-2.2.00.13405 ...
 * econf: updating prefix-portage-2.2.00.13405/config.guess with /gentoo/usr/share/gnuconfig/config.guess
 * econf: updating prefix-portage-2.2.00.13405/config.sub with /gentoo/usr/share/gnuconfig/config.sub
./configure --prefix=/gentoo/usr --build=i686-apple-darwin9 --host=i686-apple-darwin9 --mandir=/gentoo/usr/share/man --infodir=/gentoo/usr/share/info --datadir=/gentoo/usr/share --sysconfdir=/gentoo/etc --localstatedir=/gentoo/var/lib --with-portage-user=root --with-portage-group=wheel --with-root-user=root --with-offset-prefix=/gentoo --with-default-path=/usr/bin:/bin:/usr/sbin:/sbin
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
configure: WARNING: unrecognized options: --with-portage-user, --with-portage-group, --with-root-user, --with-offset-prefix, --with-default-path
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
configure: error: cannot run /bin/sh ./config.sub
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
./configure: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory

!!! Please attach the following file when seeking support:
!!! /gentoo/var/tmp/portage/sys-apps/portage-2.2.00.13405/work/prefix-portage-2.2.00.13405/config.log
 * ERROR: sys-apps/portage-2.2.00.13405 failed:
 *   econf failed
 *
 * Call stack:
 *               ebuild.sh:  49: <call src_compile>
 *             environment:2531: <call econf '--with-portage-user=root' '--with-portage-group=wheel' '--with-root-user=root' '--with-offset-prefix=/gentoo' '--with-default-path=/usr/bin:/bin:/usr/sbin:/sbin'>
/gentoo/usr/lib/portage/bin/isolated-functions.sh: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
/gentoo/usr/lib/portage/bin/isolated-functions.sh: /gentoo/usr/lib/portage/bin/ebuild-helpers/sed: /gentoo/tmp/usr/bin/bash: bad interpreter: No such file or directory
 *               ebuild.sh: 533:
 *
 * If you need support, post the topmost build error, and the call stack if relevant.

>>> Failed to emerge sys-apps/portage-2.2.00.13405, Log file:

>>>  '/gentoo/var/tmp/portage/sys-apps/portage-2.2.00.13405/temp/build.log'

 * Messages for package sys-apps/portage-2.2.00.13405:

 * ERROR: sys-apps/portage-2.2.00.13405 failed:
 *   econf failed
 *
 * Call stack:
 *               ebuild.sh:  49: <call src_compile>
 *             environment:2531: <call econf '--with-portage-user=root' '--with-portage-group=wheel' '--with-root-user=root' '--with-offset-prefix=/gentoo' '--with-default-path=/usr/bin:/bin:/usr/sbin:/sbin'>
 *               ebuild.sh: 533:
 *
 * If you need support, post the topmost build error, and the call stack if relevant.