Is there a way to manually specify RUBYMINE_DEBUG_PORT when using remote debugging?

Is there a way to manually specify RUBYMINE_DEBUG_PORT when using remote debugging (Run -> Debug 'Trinidad')? In my local dev environment, I use Vagrant and VirtualBox, with RubyMine set up to use remote-rvm. It looks like RubyMine uses a random port every time I try to debug, which is problematic because I need to forward the correct ports in my Vagrantfile. I've tried setting RUBYMINE_DEBUG_PORT as an environment variable in the Run Configuration, but it doesn't look like RubyMine honors this value.

Thanks in advance!