!!! The following installed packages are masked:

• x11-base/xorg-drivers-1.17::xorg-kit (masked by: package.mask)
  /var/git/meta-repo/kits/core-kit/profiles/package.mask/00-gentoo:

1. Matt Turner <mattst88@gentoo.org> (21 Oct 2017)
2. The 1.12 and 1.15 branches are no longer supported and remain vulnerable to
3. various CVEs (CVE-2013-6424, bug #493294 and CVE-2017-2624 bug #611350 just
4. to name a few). They remain in tree only for old nvidia-drivers 96 and 173.

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