Please check whether the use of 'einstall' in this ebuild is actually needed. From a quick glance at the Makefile, it seems to have proper support for DESTDIR. Therefore, if possible please replace the call to 'einstall' with proper 'default' or 'emake DESTDIR="${D}" install'. Thanks.
commit 3d8a6b054beff603b493de4bea764e1071eb4e85 Author: David Seifert <soap@gentoo.org> Date: Thu Jan 21 09:47:09 2016 +0100 sci-biology/iedera: Version bump to 1.05 Gentoo-Bug: 521642 * Remove use of 'einstall' * EAPI=6