isPrebuiltCheck, may want to consider if the project is `yarn link`

[stefanpenner]

I believe the algo would be something like: indexObj.root is not contained by nodeModulesOf(indexObj.project.root), and would be added to https://github.com/asakusuma/ember-rollup/blob/f01e4f7a01129b99edc8d940860c4de57a4d3e9b/src/index.js#L10

cc @lynchbomb / @arthirm

[hjdivad]

on a related note, checking isDevelopingAddon would also be helpful; as it stands, prebuilt is used even when working on addons without linking.