Is it possible to use ember-cli-addon-docs with an in-repo addon?

I have an ember.js in-repo addon and would like to add documentation using ember-cli-addon-docs. Is this possible?

I installed the addon at application level and in my ember-cli-build.js I added:

'ember-cli-addon-docs': {
    documentingAddonAt: 'lib/my-addon',
},

but this does not work and I keep getting an error in my terminal: Cannot read property 'url' of undefined

Was anyone successful with a simmilar setup