diff -Nur gentoolkit-0.3.0.7.orig/bin/euse gentoolkit-0.3.0.7/bin/euse
--- gentoolkit-0.3.0.7.orig/bin/euse	2012-10-10 06:36:24.000000000 +0900
+++ gentoolkit-0.3.0.7/bin/euse	2012-11-18 18:16:43.948416725 +0900
@@ -466,7 +466,7 @@
 	if [[ -f "${curdir}/parent" ]]; then
 		for parent in $(egrep -v '(^#|^ *$)' ${curdir}/parent); do
 			# Bug 231394, handle parent path being absolute
-			index=$(expr index "${parent}" :)
+			index=$(echo "${parent}" | sed -n 's/:.*//p' | wc -c)
 			if [[ ${parent:0:1} == "/" ]]; then
 				pdir="$(get_real_path ${parent})"
 			elif [[ $index -eq 0 ]]; then
@@ -1315,6 +1315,23 @@
 	echo "${MAKE_CONF_PATH} was modified, a backup copy has been placed at ${MAKE_CONF_BACKUP_PATH}"
 } # }}}
 
+# GNU sed wrapper
+sed(){
+	if [ -e /usr/bin/gsed ]
+	then
+		/usr/bin/gsed "$@"
+	elif [ -e /bin/sed ]
+	then
+		/bin/sed "$@"
+	elif [ -e /usr/bin/sed ]
+	then
+		/usr/bin/sed "$@"
+	else
+		echo "ERROR: failed the selection of sed."
+		exit 1
+	fi
+}
+
 ##### main program comes now #####
 
 parse_arguments "$@"