layoutName works in Ember 2.8 properly

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{my-component}}
<br>
{{outlet}}
<br>
<br>

bs-input.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

bs-input.template.hbs

<h1>test</h1>

my-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  inputLayout: 'bs-input',
	init() {
    this._super(...arguments);
		this.set('layoutName', `components/${this.get('inputLayout')}`);
	}
});

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}