How to exclude example folder when auto_register generator

[longtn-imt]

When I run the package with the example directory

Terminal log error

Deprecated. Use `dart run` instead.
[INFO] Generating build script completed, took 473ms
[INFO] Reading cached asset graph completed, took 425ms
[INFO] Checking for updates since last build completed, took 1.4s
[INFO] Running build completed, took 73ms
[INFO] Caching finalized dependency graph completed, took 205ms
[SEVERE] injectable_generator:injectable_config_builder on example/lib/config/injector.dart (cached):

FormatException: Not an instance of Type.
[SEVERE] Failed after 297ms

I edited the current configuration file build.yaml to fix the error

targets:
  $default:
    sources:
      exclude:
        - example/**

global_options:
  freezed:
    runs_before:
      - json_serializable
  json_serializable:
    runs_before:
      - retrofit_generator
  retrofit_generator:
    runs_before:
      - injectable_generator:injectable_builder