diff --git a/.dev-tools/setup-ngxblocker/setup-ngxblocker b/.dev-tools/setup-ngxblocker/setup-ngxblocker
index 08c213fd0..3a7cfdd97 100644
--- a/.dev-tools/setup-ngxblocker/setup-ngxblocker
+++ b/.dev-tools/setup-ngxblocker/setup-ngxblocker
@@ -219,10 +219,10 @@ find_line() {
 
 	case "$first_last" in
 		# ignore file #comments
-		#first) awk "/$find_str/{ print NR; exit }" $file;;
-		#last) awk "/$find_str/{ print NR }" $file | tail -n1;;
-		first) grep -nE "^[[:space:]]+$find_str" $file | head -n1 | awk -F: '{print $1}';;
-		last) grep -nE "[[:space:]]+$find_str" $file | tail -n1 | awk -F: '{print $1}';;
+		first) awk "/$find_str/{ print NR; exit }" $file;;
+		last) awk "/$find_str/{ print NR }" $file | tail -n1;;
+		#first) grep -nE "^[[:space:]]+$find_str" $file | head -n1 | awk -F: '{print $1}';;
+		#last) grep -nE "[[:space:]]+$find_str" $file | tail -n1 | awk -F: '{print $1}';;
 	esac
 }