anchor.diff:          }
         }
         stringBuffer.writeln('  build_runner: ^$kMinimumBuildRunnerVersion');
  +      stringBuffer.writeln('  build_daemon: $kSupportedBuildDaemonVersion');
         await syntheticPubspec.writeAsString(stringBuffer.toString());
   
         await pubGet(
  
positive.code: import 'build_script_generator.dart';
  
  /// The minimum version of build_runner we can support in the flutter tool.
  const String kMinimumBuildRunnerVersion = '1.2.8';
  
  /// A wrapper for a build_runner process which delegates to a generated
  /// build script.
  
negative.code:     final File syntheticPubspec = generatedDirectory.childFile('pubspec.yaml');
  
      // Check if contents of builders changed. If so, invalidate build script
      // and regenerate.
      final YamlMap builders = flutterProject.builders;
      final List<int> appliedBuilderDigest = _produceScriptId(builders);
      if (scriptIdFile.existsSync() && buildSnapshot.existsSync()) {
  