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.
Do we still need this package? There are many other packages for virtual/checkpassword and this looks dead for ages
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=066fcd7e63f13338c1518cee0d0a6ca16e6f8358 and subsequent cleanup resolved this.