Please replace all assignments of INSOPTIONS by insopts() calls. See tracker bug 566478 for an explanation and policy references.
commit 110a28b0894efd13218961daa82b7601fe3777f4 Author: Michał Górny <mgorny@gentoo.org> Date: Sat May 14 10:04:29 2016 +0200 media-gfx/iscan-plugin-gt-f720: INSOPTIONS -> insopts, #566488