diff --git a/common/hooks/do-patch/00-patches.sh b/common/hooks/do-patch/00-patches.sh
index 7aca707fe0f..b3b94c25c6c 100644
--- a/common/hooks/do-patch/00-patches.sh
+++ b/common/hooks/do-patch/00-patches.sh
@@ -45,7 +45,7 @@ hook() {
 	else
 		for f in $PATCHESDIR/*; do
 			[ ! -f $f ] && continue
-			if $(echo $f|grep -Eq '^.*.args$'); then
+			if [[ $f =~ ^.*.args$ ]]; then
 				continue
 			fi
 			_process_patch $f