AWS Chalice using custom config path or custom app path?

I am trying to use Chalice to fit into an pre-existing build folder structure, the python source file (app.py) is one level deeper than the vanilla Chalice project

├── .chalice
│   └── config.json
└── src
    ├── app.py
    ├── requirements.txt
    ├── requirements_test.txt

When I run chalice local in src folder it says it cannot find the config file:

Unable to load the project config file. Are you sure this is a chalice project?

When I run chalice local in the project folder, it says it cannot find the source file:

No module named 'app'

I had a look at the config file doesn't seem to have an option to specify where the source file is.