diff --git a/frontend/scripts/flutter_release_build/build_flowy.dart b/frontend/scripts/flutter_release_build/build_flowy.dart
index 5cd1989bb0087..03f3b58503144 100644
--- a/frontend/scripts/flutter_release_build/build_flowy.dart
+++ b/frontend/scripts/flutter_release_build/build_flowy.dart
@@ -2,6 +2,9 @@ import 'dart:io';
 
 part 'tool.dart';
 
+const excludeTagBegin = 'BEGIN: EXCLUDE_IN_RELEASE';
+const excludeTagEnd = 'END: EXCLUDE_IN_RELEASE';
+
 Future<void> main(List<String> args) async {
   const help = '''
 A build script that modifies build assets before building the release version of AppFlowy.
diff --git a/frontend/scripts/flutter_release_build/tool.dart b/frontend/scripts/flutter_release_build/tool.dart
index 362cf11d68837..2b91e1571d39d 100644
--- a/frontend/scripts/flutter_release_build/tool.dart
+++ b/frontend/scripts/flutter_release_build/tool.dart
@@ -66,9 +66,9 @@ class _BuildTool {
     var scanMode = _ScanMode.ignore;
     for (var i = 0; i < lines.length; i++) {
       var line = lines[i];
-      if (line.contains('BEGIN: EXCLUDE_IN_RELEASE')) {
+      if (line.contains(excludeTagBegin)) {
         scanMode = _ScanMode.target;
-      } else if (line.contains('END: EXCLUDE_IN_RELEASE')) {
+      } else if (line.contains(excludeTagBegin)) {
         scanMode = _ScanMode.ignore;
       } else if (scanMode == _ScanMode.target) {
         lines[i] = _modify(line, mode: mode);