make sure that you a prompted to add node: current to targets

packages/ember-cli-fastboot/blueprints/ember-cli-fastboot/index.js

@@ -1,20 +1,35 @@
 /* eslint-env node */
 const recast = require('recast');
 const { readFileSync, writeFileSync } = require('fs');
+const { join, dirname } = require('path')
+const tmp = require('tmp');
+const mkdirp = require('mkdirp');
 
 module.exports = {
   description: '',
   normalizeEntityName() {
     // no-op
   },
 
-  afterInstall() {
-    let targetsFile = './config/targets.js'
+  filesPath() {
+    return this._filesPath;
+  },
+
+  _targetsFile(project) {
+    let configPath = 'config';
 
-    if(this.project.isEmberCLIAddon()) {
-      targetsFile = './tests/dummy/config/targets.js';
+    if (project.pkg['ember-addon'] && project.pkg['ember-addon']['configPath']) {
+      configPath = project.pkg['ember-addon']['configPath'];
     }
 
+    return join(configPath, 'targets.js');
+  },
+
+  install(options) {
+    this._filesPath = tmp.dirSync().name;
+
+    const targetsFile = this._targetsFile(options.project);
+
     const targetsAst = recast.parse(readFileSync(targetsFile));
 
     recast.visit(targetsAst, {
@@ -39,6 +54,10 @@ module.exports = {
       }
     });
 
-    writeFileSync(targetsFile, recast.print(targetsAst, { tabWidth: 2, quote: 'single' }).code);
+    let newFile = join(this._filesPath, targetsFile);
+    mkdirp.sync(dirname(newFile));
+    writeFileSync(newFile, recast.print(targetsAst, { tabWidth: 2, quote: 'single' }).code);
+
+    return this._super.install.apply(this, arguments);
   }
 };

packages/ember-cli-fastboot/package.json

@@ -39,8 +39,10 @@
     "fs-extra": "^7.0.0",
     "json-stable-stringify": "^1.0.1",
     "md5-hex": "^2.0.0",
+    "mkdirp": "^1.0.4",
     "recast": "^0.19.1",
-    "silent-error": "^1.1.0"
+    "silent-error": "^1.1.0",
+    "tmp": "^0.2.1"
   },
   "devDependencies": {
     "body-parser": "^1.18.3",