Reference self key in serverless.yml

Serverless Framework
1

Hi,

Is there a way to self reference the key of the yml file:

Instead of this:

serverless.yml

 provider:
      name: aws
      region: 'eu-west-1'
      runtime: nodejs12.x
      stage: ${opt:stage, 'dev'}
      environment:
        KEY_HERE: ${self:provider.stage}_KEY_HERE

it could be shortened to this:

provider:
  name: aws
  region: 'eu-west-1'
  runtime: nodejs12.x
  stage: ${opt:stage, 'dev'}
  environment:
    KEY_HERE: ${self:provider.stage}_${self.key}

Thanks!