Is there any way to use an imported mapping in the api.service itself?

I already have an external dependcy with my typings (@entities)
And an api which uses them.

If i generate the api client with

$ openapi-generator generate -i http://xxx -g typescript-angular -c ./gen.cfg

gen.cfg:
{ "importMappings": { "Payload":"@entities" } }

the import in the default.services.ts is import { Payload } from '../@entities';
(because in the api.service.mustache the import is import { {{classname}} } from '../{{filename}}';)

but the correct path would be: import { Payload } from '@entities';

is there any way to achieve this?