Hi, Since portage-2.1.7.x is stable now, with ACCEPT_LICENSE support, we can think about deprecating check_license [1]. This will allow us to avoid using PROPERTIES=interactive in cases when it is due to check_license alone, since anything with a license in the @EULA license group is automatically masked by the default ACCEPT_LICENSE="* -...@eula" portage configuration [2].
[1] http://bugs.gentoo.org/show_bug.cgi?id=299095 [2] http://bugs.gentoo.org/show_bug.cgi?id=302645 -- Thanks, Zac