I have a dependency that includes this Babel configuration in `package.json`: ``` json "babel": { "presets": [ "es2015", "react" ] } ``` I have found that when this dependency is installed I get the following error (sometimes at runtime or sometimes at build): <img width="358" alt="screen shot 2016-01-12 at 4 24 11 pm" src="https://cloud.githubusercontent.com/assets/284476/12277377/017f4014-b949-11e5-9d05-8f9c992bf79f.png"> If I remove the `babel` settings aforementioned this error does not occur. I think the opaque error message is due to https://github.com/facebook/react-native/issues/5191.