diff --git a/dev-util/cmake/cmake-3.11.1.ebuild b/dev-util/cmake/cmake-3.11.1.ebuild
index 2ceccc1ef95..121e8eb42ba 100644
--- a/dev-util/cmake/cmake-3.11.1.ebuild
+++ b/dev-util/cmake/cmake-3.11.1.ebuild
@@ -65,10 +65,8 @@ PATCHES=(
 cmake_src_bootstrap() {
 	# Cleanup args to extract only JOBS.
 	# Because bootstrap does not know anything else.
-	echo ${MAKEOPTS} | egrep -o '(\-j|\-\-jobs)(=?|[[:space:]]*)[[:digit:]]+' > /dev/null
-	if [ $? -eq 0 ]; then
-		par_arg=$(echo ${MAKEOPTS} | egrep -o '(\-j|\-\-jobs)(=?|[[:space:]]*)[[:digit:]]+' | tail -n1 | egrep -o '[[:digit:]]+')
-		par_arg="--parallel=${par_arg}"
+	if grep -Eq '(\-j|\-\-jobs)(=*|[[:space:]]*)[[:digit:]]+' <<< ${MAKEOPTS} : then
+		par_arg="--parallel=$(sed 's@.*\(-j\|--jobs\)\(=*\|[[:space:]]*\)\([[:digit:]]\+\).*@\3@' <<< ${MAKEOPTS})"
 	else
 		par_arg="--parallel=1"
 	fi