What is correct way to use dependencies on both of addon and dummy app?

So I have two addons. One of it depends on another. For example Addon A depends on Addon B.

I want to import styles from Addon B, in Addon A but I can't seem get it to work. What is the proper way of doing this? I tried something like this:

`addon-a/app/styles/addon-a.scss`
```
@import 'addon-b';
@import 'pod-styles';
```

But when building the Addon A (via ember build), this file is not processed at all (i dont know why). It looks for addon.scss instead. And failing the build due to missing mixin which declared on addon-b.

Also due to written logic on some components, i need exact same css on dummy folder. I presume I can simply do `@import 'addon-a';` at dummy folder but I couldn't try yet.