I just installed a new system and emerged some packages. sys-process/cronbase is however failing because it uses the eutils eclass and the eclass uses groupadd but the package providing groupadd is not installed.
>>> Emerging (3 of 9) sys-process/cronbase-0.3.2 to /
* checking ebuild checksums ;-) ... [ ok ]
* checking auxfile checksums ;-) ... [ ok ]
* checking miscfile checksums ;-) ... [ ok ]
* Adding group 'cron' to your system ...
* - Groupid: 16
/usr/portage/eclass/eutils.eclass: line 708: groupadd: command not found
!!! ERROR: sys-process/cronbase-0.3.2 failed.
ebuild.sh, line 1637: Called dyn_setup
ebuild.sh, line 704: Called qa_call 'pkg_setup'
ebuild.sh, line 44: Called pkg_setup
cronbase-0.3.2.ebuild, line 16: Called enewgroup 'cron' '16'
eutils.eclass, line 708: Called die
!!! enewgroup failed
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/sys-process/cronbase-0.3.2/temp/build.log'.
*** This bug has been marked as a duplicate of bug 53269 ***