Index: app-emacs/emacs-common-gentoo/emacs-common-gentoo-1.5.ebuild
===================================================================
RCS file: /var/cvsroot/gentoo-x86/app-emacs/emacs-common-gentoo/emacs-common-gentoo-1.5.ebuild,v
retrieving revision 1.11
diff -u -r1.11 emacs-common-gentoo-1.5.ebuild
--- app-emacs/emacs-common-gentoo/emacs-common-gentoo-1.5.ebuild	5 Jun 2015 12:07:06 -0000	1.11
+++ app-emacs/emacs-common-gentoo/emacs-common-gentoo-1.5.ebuild	11 Jul 2015 14:17:41 -0000
@@ -70,13 +70,17 @@
 }
 
 pkg_preinst() {
-	# make sure that site-gentoo.el exists since site-start.el requires it
-	if [[ ! -d ${EROOT}${SITELISP} ]]; then
-		mv "${ED}${SITELISP}"/site-gentoo.el{.orig,} || die
-	else
-		elisp-site-regen
-		rm "${ED}${SITELISP}/site-gentoo.el.orig" || die
-		cp "${EROOT}${SITELISP}/site-gentoo.el" "${ED}${SITELISP}/" || die
+	# To support portage-multilib (multilib-overlay), only do this once
+	# because pkg_preinst() will be called multiple times.
+	if [[ ! -f ${ED}${SITELISP}/site-gentoo.el ]]; then
+		# make sure that site-gentoo.el exists since site-start.el requires it.
+		if [[ ! -d ${EROOT}${SITELISP} ]]; then
+			mv "${ED}${SITELISP}"/site-gentoo.el{.orig,} || die
+		else
+			elisp-site-regen
+			rm "${ED}${SITELISP}/site-gentoo.el.orig" || die
+			cp "${EROOT}${SITELISP}/site-gentoo.el" "${ED}${SITELISP}/" || die
+		fi
 	fi
 
 	if use games; then