--- portage-2.2_rc15/bin/ebuild.sh
+++ portage-2.2_rc15/bin/ebuild.sh
@@ -520,9 +520,9 @@
 			--localstatedir=/var/lib \
 			"$@" \
 			${EXTRA_ECONF}
-		vecho "${ECONF_SOURCE}/configure" "$@"
+		vecho ${CONFIG_SHELL} "${ECONF_SOURCE}/configure" "$@"
 
-		if ! "${ECONF_SOURCE}/configure" "$@" ; then
+		if ! ${CONFIG_SHELL} "${ECONF_SOURCE}/configure" "$@" ; then
 
 			if [ -s config.log ]; then
 				echo