Updating addon gives error in 0.2.1

[alvincrespo]

When running ember init inside an addon the following error is given:

➜  fly-blankslate git:(master) ✗ ember addon init
The package `ember-data` is not a properly formatted package, we have used a fallback lookup to resolve it at `/Users/alvincrespo/workspace/fly-blankslate/node_modules/ember-data`. This is generally caused by an addon not having a `main` entry point (or `index.js`).
version: 0.2.1
You cannot use the addon command inside an ember-cli project.
➜  fly-blankslate git:(master) ✗ clear
➜  fly-blankslate git:(master) ✗ clear
➜  fly-blankslate git:(master) ✗ ember init
The package `ember-data` is not a properly formatted package, we have used a fallback lookup to resolve it at `/Users/alvincrespo/workspace/fly-blankslate/node_modules/ember-data`. This is generally caused by an addon not having a `main` entry point (or `index.js`).
version: 0.2.1
installing
Generating an addon in an existing ember-cli project is not supported.