How to specify a different path for the Shopify CLI to deploy from?

[suryarajendhran]

I'm trying to migrate an app to the new 3.0 CLI. And my extensions are built to a different folder called build. I want the shopify CLI to look into that folder to find the expected extensions folder. I tried using the path argument but it still only detected the extensions folder when it is placed at the root and not inside the build folder.

This is how I used the command: 

shopify app deploy --path build

Any help would be appreciated.