use content-tag

ember-addon-main.js

@@ -1,12 +1,11 @@
 'use strict';
 require('validate-peer-dependencies')(__dirname);
 let VersionChecker = require('ember-cli-version-checker');
-let { addPlugin, hasPlugin } = require('ember-cli-babel-plugin-helpers');
 
 module.exports = {
   name: require('./package').name,
 
-  included(includer) {
+  included() {
     this._super.included.apply(this, arguments);
 
     let emberChecker = new VersionChecker(this.project).for('ember-source');
@@ -17,10 +16,15 @@
       );
     }
 
-    let pluginPath = require.resolve('./src/babel-plugin');
+    const semver = require('semver');
 
-    if (!hasPlugin(includer, pluginPath)) {
-      addPlugin(includer, pluginPath);
+    let babel = this.project.findAddonByName('ember-cli-babel');
+    let hasBabel = babel !== undefined;
+    let babelVersion = hasBabel && babel.pkg.version;
+    let hasValidBabelVersion = hasBabel && semver.gte(babelVersion, '8.0.0');
+
+    if (!hasValidBabelVersion) {
+      throw new Error('ember-template-imports requires ember-cli-babel with at least version 8.0.0');
     }
 
     // Used in ember-cli-htmlbars to get the location of templateCompiler without traversing this.addons (https://github.com/ember-cli/ember-cli-htmlbars/blob/6860beed9a357d5e948abd09754e8a978fed1320/lib/ember-addon-main.js#L264)

package.json

@@ -33,6 +33,7 @@
   "dependencies": {
     "babel-import-util": "^0.2.0",
     "broccoli-stew": "^3.0.0",
+    "content-tag": "^1.0.0",
     "ember-cli-babel-plugin-helpers": "^1.1.1",
     "ember-cli-version-checker": "^5.1.2",
     "line-column": "^1.0.2",