Fastboot and Ember Concurrency?

route.js

// Route
import Ember from 'ember';
import { task } from 'ember-concurrency';

export default Ember.Route.extend({
  // This won't work as Fastboot needs the model to be resolved on render.
  // A promise could be used to wait for 'getPost' to resolve, but I would lose the usefulness of ember-concurrencies derived state.
  model: function(params) {
    return {
      listing: this.get('getPost').perform(params.post_id),
    };
  },

  getPost: task(function * (postId) {
    return yield this.store.findRecord('post', postId)
  }),
});

template.hbs

{{!-- Template --}}
{{#if model.post.value}}
  {{post.title}}
  {{post.description}}
{{/if}}