Fix for parallel babel

ember-cli-build.js

@@ -4,7 +4,10 @@ const EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
 
 module.exports = function(defaults) {
   let app = new EmberAddon(defaults, {
-    // Add options here
+    // This can be uncommented when babel parallelization works for ember-font-awesome
+    /* 'ember-cli-babel': {
+      throwUnlessParallelizable: true,
+    }, */
   });
 
   /*

index.js

@@ -26,16 +26,26 @@ module.exports = {
 
   setupPreprocessorRegistry(type, registry) {
     if (this.shouldPolyfill) {
-      registry.add('htmlbars-ast-plugin', {
-        name: 'component-attributes',
-        plugin: require('./lib/ast-transform'),
-        baseDir() {
-          return __dirname;
-        },
-      });
+      let pluginObj = this._buildPlugin();
+      pluginObj.parallelBabel = {
+        requireFile: __filename,
+        buildUsing: '_buildPlugin',
+        params: {}
+      }
+      registry.add("htmlbars-ast-plugin", pluginObj);
     }
   },
 
+ _buildPlugin() {
+    return {
+      name: 'component-attributes',
+      plugin: require('./lib/ast-transform'),
+      baseDir() {
+        return __dirname;
+      }
+    };
+  },
+
   included() {
     this._super.included.apply(this, arguments);
 

package.json

@@ -21,9 +21,9 @@
     "test:all": "ember try:each"
   },
   "dependencies": {
-    "ember-cli-babel": "^6.6.0",
+    "ember-cli-babel": "^6.17.0",
     "ember-cli-version-checker": "^2.1.2",
-    "ember-compatibility-helpers": "^1.0.0"
+    "ember-compatibility-helpers": "^1.0.2"
   },
   "devDependencies": {
     "broccoli-asset-rev": "^2.7.0",