Extension does not comply with Behat's file configuration handling specification

[walterdolce]

Looks like the extension does not comply with the way Behat handles the configuration file and its "variables".

default:
    Zalas\Behat\NoExtension:
      imports:
        - %paths.base%/features/behat/bootstrap/config/services.yml

Throws:

[InvalidArgumentException]
  The file "%paths.base%/features/behat/bootstrap/config/services.yml" does not exist

Shouldn't the %paths.base% be evaluated by the extension, just like Behat does?