The ebuild listed in summary uses a live eclass to fetch sources, and is not masked. Please update it to use a fetchable snapshot instead. Rationale is available in tracker bug #585712.
commit efe7d05349ed954fb949850ac70af049da7bfd08 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: Sun Jun 26 18:51:42 2016 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: Sun Jun 26 19:03:24 2016 app-crypt/efitools: Use snapshot for building, #585714