[Question] How are placeholders passed to config?

Hi.

When using config via openapitools.json, the documentation states that placeholders are in use, e.g for. cwd and name:

{
  "$schema": "node_modules/@openapitools/openapi-generator-cli/config.schema.json",
  "spaces": 2,
  "generator-cli": {
    "version": "5.1.1",
    "generators": { // optional
      "my-generator": 
        "generatorName": "typescript-angular",
         "inputSpec": "#{cwd}/specs/${name}.json",
        "output": "#{cwd}/output/#{name}",
      }
    }
  }
}

My question is how do I pass the placeholders in the command? Ive tried

yarn run openapi-generator-cli generate --generator-key my-generator --name my-spec, but the name property doesnt get through to the generator:

[error] The spec file is not found: {..this path is correct (cwd)....}/specs/.json <---- name is missing

I could use something like envsubst, but that seems unnecessary?