emerge --update --deep --newuse world
Calculating world dependencies /
!!! All ebuilds that could satisfy ">=sys-apps/groff-1.19.2-r1" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-apps/groff-1.19.2-r2 (masked by: package.mask)
- sys-apps/groff-1.19.2-r1 (masked by: package.mask)

For more information, see MASKED PACKAGES section in the emerge man page or
refer to the Gentoo Handbook.
(dependency required by "sys-apps/man-1.6f-r1" [ebuild])



!!! Problem resolving dependencies for sys-apps/man-pages
!!! Depgraph creation failed.