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="${D}" install'. Thanks.
0.8.5.3 was already fixed (it uses default phases) 0.8.4.1 (current stable version) updated to 'emake DESTDIR="${D}" install'