without adding the line =app-portage/gentoolkit-0.2.3_pre1 to packages.mask I got since today: Calculating world dependencies - !!! All ebuilds that could satisfy ">=sys-apps/portage-2.1.1_pre1" have been masked. !!! One of the following masked packages is required to complete your request: - sys-apps/portage-2.1.1_rc1-r3 (masked by: ~x86 keyword) - sys-apps/portage-2.1.1_rc1-r2 (masked by: ~x86 keyword) For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. (dependency required by "app-portage/gentoolkit-0.2.3_pre1" [ebuild]) !!! Problem resolving dependencies for app-portage/gentoolkit !!! Depgraph creation failed.
Both are unstable -> no bug. Either add them both to package.keywords or neither.