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 826a634f66a0056244ddca2dee2ec8424f7823d1 Author: Michael Palimaka <kensington@gentoo.org> Date: Wed May 11 20:01:16 2016 +1000 media-libs/libmnote: remove last-rited package