运行flutter packages pub run json_model 命令报错

[tk-canday]

The method 'cleanFor' isn't defined for the class 'CleanCommand'.

• 'CleanCommand' is from 'file:///Users/canday/.pub-cache/hosted/pub.flutter-io.cn/json_model-0.0.2/bin/src/commands/clean.dart'.
  Try correcting the name to the name of an existing method, or defining a method named 'cleanFor'.
  await cleanFor(assetGraphPathFor(scriptLocation), logger);

[chenjianjun571]

json文件是没有问题的，但是还是报这个错误

[chenjianjun571]

• 'CleanCommand' is from '../../../flutter/.pub-cache/hosted/pub.flutter-io.cn/json_model-0.0.2/bin/src/commands/clean.dart'.
  Try correcting the name to the name of an existing method, or defining a method named 'cleanFor'.
  await cleanFor(assetGraphPathFor(scriptLocation), logger);

[ldb-github]

同样遇到这个问题 @chenjianjun571 是否已解决了呢？

[ldb-github]

修改dev_dependencies：build_runner: ^1.6.0 @chenjianjun571