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.
+*nginx-1.7.10 (10 Mar 2015) + + 10 Mar 2015; Justin Lecher <jlec@gentoo.org> +files/AJP-nginx-1.7.9+.patch, + +nginx-1.7.10.ebuild, metadata.xml, nginx-1.7.6.ebuild, nginx-1.7.7.ebuild, + nginx-1.7.8.ebuild: + Version BUmp, #531542; fix for musl, #533570; drop suspecious einstall, + #521662; fix SLOT operators +