Could you improve symfony/yaml dependency from ^3.1 to 2.8|^3.1?

Context: current phing/phing (2.16) package requires symfony/yaml ^3.1, but drupal/core 8.2.5 (complying the criteria ~8.0 defined in composer.json distributed with drupal-composer/drupal-project project) requires symfony/yaml ~2.8.

So how to build (but not crack) environment that provides drupal/core as well as phing/phing?