There must be a transformer defined in pubspec.yaml - please add this to the README

[MikeMitterer]

pubspec.yaml:

...
transformers:
  - di

If you use di without Angular you need the di-transformer set. Without it produces a DEFAULT_REFLECTOR error - I know there is a wiki page for this but why not add it to the README. Would solve a lot of trouble and googling for this particular error