Calculating dependencies... done!

!!! All ebuilds that could satisfy "app-emulation/virtualbox-extpack-oracle" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-emulation/virtualbox-extpack-oracle-6.0.4.128413::gentoo (masked by: PUEL license(s))
A copy of the 'PUEL' license is located at '/usr/portage/licenses/PUEL'.

- app-emulation/virtualbox-extpack-oracle-6.0.2.128162::gentoo (masked by: PUEL license(s))
- app-emulation/virtualbox-extpack-oracle-5.2.26.128414::gentoo (masked by: PUEL license(s), ~amd64 keyword)
- app-emulation/virtualbox-extpack-oracle-5.2.24.128163::gentoo (masked by: PUEL license(s), ~amd64 keyword)
- app-emulation/virtualbox-extpack-oracle-5.2.22.126460::gentoo (masked by: PUEL license(s))

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.