From 5df9a41e3b2d1236391fa4dc8fbb67865b710d77 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <felix.buenemann@gmail.com>
Date: Mon, 10 Nov 2025 12:03:41 +0100
Subject: [PATCH 1/5] Fix ember v6 deprecate-import-view-utils-from-ember
 deprecation

---
 .../vendor/experimental-render-mode-rehydrate.js             | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js b/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
index 9dd3518f..aa7d4ba4 100644
--- a/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
+++ b/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
@@ -4,6 +4,7 @@
     var current = document.getElementById('fastboot-body-start');
 
     var _Ember = require.has('ember') ? require('ember').default : window.Ember;
+    var _ViewUtils = require.has('@ember/-internals/views') ? require('@ember/-internals/views') : _Ember.ViewUtils;
 
     if (current && !_Ember) {
       console.error(`Experimental render mode rehydrate isn't working because it couldn't find Ember via AMD or global.
@@ -13,8 +14,8 @@ See https://github.com/ember-fastboot/ember-cli-fastboot/issues/938 for the curr
 
     if (
       current &&
-      typeof _Ember.ViewUtils.isSerializationFirstNode === 'function' &&
-      _Ember.ViewUtils.isSerializationFirstNode(current.nextSibling)
+      typeof _ViewUtils.isSerializationFirstNode === 'function' &&
+      _ViewUtils.isSerializationFirstNode(current.nextSibling)
     ) {
       _Ember.ApplicationInstance.reopen({
         _bootSync: function(options) {

From 26c165495c6df1694d7e33500125db631e4d8d8b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <felix.buenemann@gmail.com>
Date: Mon, 10 Nov 2025 12:07:33 +0100
Subject: [PATCH 2/5] Fix ember v6 importing-inject-from-ember-service
 deprecation

---
 packages/ember-cli-fastboot/addon/locations/none.js           | 2 +-
 .../test-scenarios/fastboot-config-location-test.mjs          | 2 +-
 .../test-scenarios/fastboot-express-middleware-test.mjs       | 4 ++--
 test-packages/test-scenarios/fastboot-shoebox-test.mjs        | 2 +-
 .../fixtures/basic-app/app/components/async-content.js        | 2 +-
 .../fixtures/basic-app/app/routes/application.js              | 2 +-
 .../fixtures/basic-app/app/routes/echo-request-headers.js     | 2 +-
 .../fixtures/basic-app/app/routes/head-content.js             | 2 +-
 .../test-scenarios/fixtures/basic-app/app/routes/metadata.js  | 2 +-
 .../fixtures/basic-app/app/routes/return-status-code-418.js   | 2 +-
 10 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/packages/ember-cli-fastboot/addon/locations/none.js b/packages/ember-cli-fastboot/addon/locations/none.js
index c21f2e9a..bd95aaea 100644
--- a/packages/ember-cli-fastboot/addon/locations/none.js
+++ b/packages/ember-cli-fastboot/addon/locations/none.js
@@ -1,7 +1,7 @@
 /* eslint-disable ember/no-classic-classes, ember/no-get, ember/require-computed-property-dependencies, prettier/prettier */
 import { computed, get } from '@ember/object';
 import { bool, readOnly } from '@ember/object/computed';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 import { getOwner } from '@ember/application'
 import NoneLocation from '@ember/routing/none-location'
 
diff --git a/test-packages/test-scenarios/fastboot-config-location-test.mjs b/test-packages/test-scenarios/fastboot-config-location-test.mjs
index 0ca92a8d..36b40016 100644
--- a/test-packages/test-scenarios/fastboot-config-location-test.mjs
+++ b/test-packages/test-scenarios/fastboot-config-location-test.mjs
@@ -14,7 +14,7 @@ appScenarios
         routes: {
           'redirect-on-transition-to.js': `
           import Route from '@ember/routing/route';
-          import { inject as service } from '@ember/service';
+          import { service } from '@ember/service';
 
           export default class MyRoute extends Route {
             @service
diff --git a/test-packages/test-scenarios/fastboot-express-middleware-test.mjs b/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
index 3ffb46da..3d01e87f 100644
--- a/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
+++ b/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
@@ -27,7 +27,7 @@ appScenarios
       app: {
         routes: {
           'index.js': `import Route from '@ember/routing/route';
-          import { inject as service } from '@ember/service';
+          import { service } from '@ember/service';
 
           function isEmptyObject(obj) {
             return Object.keys(obj).length === 0 && obj.constructor.name === 'Object';
@@ -46,7 +46,7 @@ appScenarios
             }
           }`,
           'application.js': `import Route from '@ember/routing/route';
-          import { inject as service } from '@ember/service';
+          import { service } from '@ember/service';
 
           export default class ApplicationRoute extends Route {
             @service fastboot;
diff --git a/test-packages/test-scenarios/fastboot-shoebox-test.mjs b/test-packages/test-scenarios/fastboot-shoebox-test.mjs
index 87cd1b93..d5f7614f 100644
--- a/test-packages/test-scenarios/fastboot-shoebox-test.mjs
+++ b/test-packages/test-scenarios/fastboot-shoebox-test.mjs
@@ -13,7 +13,7 @@ appScenarios
       app: {
         routes: {
           'application.js': `import Route from '@ember/routing/route';
-          import { inject as service } from '@ember/service'
+          import { service } from '@ember/service'
 
           export default class ApplicationRoute extends Route {
             @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js b/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
index 078c2106..665147db 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
@@ -2,7 +2,7 @@ import { defer } from 'rsvp';
 import { later } from '@ember/runloop';
 import Component from '@glimmer/component';
 import { tracked } from '@glimmer/tracking';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default class AsyncContenComponent extends Component {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
index 535359af..030b7cfd 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
@@ -1,5 +1,5 @@
 import Route from '@ember/routing/route';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default class ApplicationRoute extends Route {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
index 063e07aa..6fc90f7d 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
@@ -1,5 +1,5 @@
 import Route from '@ember/routing/route';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default class EchoRequestHeadersRoute extends Route {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
index a92dbe9e..5b68c009 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
@@ -1,6 +1,6 @@
 import { set } from '@ember/object';
 import Route from '@ember/routing/route';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default class HeadContentRoute extends Route {
   @service headData;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
index 4f0983ab..98e64446 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
@@ -1,5 +1,5 @@
 import Route from '@ember/routing/route';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default Route.extend({
   fastboot: service(),
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
index 3aea4391..830b1ca0 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
@@ -1,5 +1,5 @@
 import Route from '@ember/routing/route';
-import { inject as service } from '@ember/service';
+import { service } from '@ember/service';
 
 export default class ReturnStatusCode418Route extends Route {
   @service fastboot;

From 8a5fcc825ad5ade145c2cbc94447f0ec8461534b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <felix.buenemann@gmail.com>
Date: Mon, 10 Nov 2025 12:16:41 +0100
Subject: [PATCH 3/5] Fix ember v6 deprecate-import-onerror-from-ember
 deprecation

---
 .../fastboot/initializers/error-handler.js          |  8 ++++----
 .../test-scenarios/oneerror-per-visit-test.mjs      | 13 ++++++++-----
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/packages/ember-cli-fastboot/fastboot/initializers/error-handler.js b/packages/ember-cli-fastboot/fastboot/initializers/error-handler.js
index 0d1a6979..5e8006a3 100644
--- a/packages/ember-cli-fastboot/fastboot/initializers/error-handler.js
+++ b/packages/ember-cli-fastboot/fastboot/initializers/error-handler.js
@@ -1,5 +1,5 @@
 /* eslint-disable prettier/prettier */
-import Ember from 'ember';
+import { getOnerror, setOnerror } from '@ember/-internals/error-handling';
 
 /**
  * Initializer to attach an `onError` hook to your app running in fastboot. It catches any run loop
@@ -10,12 +10,12 @@ export default {
   name: 'error-handler',
 
   initialize: function() {
-    if (!Ember.onerror) {
+    if (!getOnerror()) {
       // if no onerror handler is defined, define one for fastboot environments
-      Ember.onerror = function(err) {
+      setOnerror(function(err) {
         const errorMessage = `There was an error running your app in fastboot. More info about the error: \n ${err.stack || err}`;
         console.error(errorMessage);
-      }
+      });
     }
   }
 };
diff --git a/test-packages/test-scenarios/oneerror-per-visit-test.mjs b/test-packages/test-scenarios/oneerror-per-visit-test.mjs
index a5e469df..06b5fdd4 100644
--- a/test-packages/test-scenarios/oneerror-per-visit-test.mjs
+++ b/test-packages/test-scenarios/oneerror-per-visit-test.mjs
@@ -24,7 +24,7 @@ appScenarios
           });
         });`,
         'instance-initializers': {
-          'setup-onerror.js': `import Ember from 'ember';
+          'setup-onerror.js': `import { setOnerror } from '@ember/-internals/error-handling';
           export function initialize(owner) {
             let isFastBoot = typeof 'FastBoot' !== 'undefined';
             let fastbootRequestPath;
@@ -36,12 +36,12 @@ appScenarios
 
             console.log('setting up error handler ' + fastbootRequestPath);
 
-            Ember.onerror = function (error) {
+            setOnerror(function (error) {
               if (isFastBoot) {
                 error.fastbootRequestPath = fastbootRequestPath;
                 throw error;
               }
-            };
+            });
           }
 
           export default {
@@ -52,12 +52,15 @@ appScenarios
         routes: {
           'application.js': `import Route from '@ember/routing/route';
           import { action } from '@ember/object';
-          import Ember from 'ember';
+          import { getOnerror } from '@ember/-internals/error-handling';
 
           export default class ApplicationRoute extends Route {
             @action
             error(err) {
-              Ember.onerror(err);
+              const onerror = getOnerror();
+              if (onerror) {
+                onerror(err);
+              }
             }
           }
           `,

From 879a1d84c77538636316fb35a32330266d5fbe39 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <felix.buenemann@gmail.com>
Date: Mon, 17 Nov 2025 16:13:24 +0100
Subject: [PATCH 4/5] Add backward compatibility with inject as service import

---
 packages/ember-cli-fastboot/addon/locations/none.js         | 3 ++-
 .../tests/dummy/app/routes/application.js                   | 3 ++-
 .../test-scenarios/fastboot-config-location-test.mjs        | 3 ++-
 .../test-scenarios/fastboot-express-middleware-test.mjs     | 6 ++++--
 test-packages/test-scenarios/fastboot-shoebox-test.mjs      | 3 ++-
 .../fixtures/basic-app/app/components/async-content.js      | 3 ++-
 .../fixtures/basic-app/app/routes/application.js            | 3 ++-
 .../fixtures/basic-app/app/routes/echo-request-headers.js   | 3 ++-
 .../fixtures/basic-app/app/routes/head-content.js           | 3 ++-
 .../fixtures/basic-app/app/routes/metadata.js               | 3 ++-
 .../fixtures/basic-app/app/routes/return-status-code-418.js | 3 ++-
 11 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/packages/ember-cli-fastboot/addon/locations/none.js b/packages/ember-cli-fastboot/addon/locations/none.js
index bd95aaea..03f42cfc 100644
--- a/packages/ember-cli-fastboot/addon/locations/none.js
+++ b/packages/ember-cli-fastboot/addon/locations/none.js
@@ -1,7 +1,8 @@
 /* eslint-disable ember/no-classic-classes, ember/no-get, ember/require-computed-property-dependencies, prettier/prettier */
 import { computed, get } from '@ember/object';
 import { bool, readOnly } from '@ember/object/computed';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 import { getOwner } from '@ember/application'
 import NoneLocation from '@ember/routing/none-location'
 
diff --git a/packages/ember-cli-fastboot/tests/dummy/app/routes/application.js b/packages/ember-cli-fastboot/tests/dummy/app/routes/application.js
index 69045116..baa1b32b 100644
--- a/packages/ember-cli-fastboot/tests/dummy/app/routes/application.js
+++ b/packages/ember-cli-fastboot/tests/dummy/app/routes/application.js
@@ -1,6 +1,7 @@
 /* eslint-disable ember/no-classic-classes, ember/no-get, prettier/prettier */
 import Route from '@ember/routing/route';
-import { inject } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const inject = serviceModule.service || serviceModule.inject;
 import { readOnly } from '@ember/object/computed';
 
 export default Route.extend({
diff --git a/test-packages/test-scenarios/fastboot-config-location-test.mjs b/test-packages/test-scenarios/fastboot-config-location-test.mjs
index 36b40016..838a93e3 100644
--- a/test-packages/test-scenarios/fastboot-config-location-test.mjs
+++ b/test-packages/test-scenarios/fastboot-config-location-test.mjs
@@ -14,7 +14,8 @@ appScenarios
         routes: {
           'redirect-on-transition-to.js': `
           import Route from '@ember/routing/route';
-          import { service } from '@ember/service';
+          import * as serviceModule from '@ember/service';
+          const service = serviceModule.service || serviceModule.inject;
 
           export default class MyRoute extends Route {
             @service
diff --git a/test-packages/test-scenarios/fastboot-express-middleware-test.mjs b/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
index 3d01e87f..b3222a04 100644
--- a/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
+++ b/test-packages/test-scenarios/fastboot-express-middleware-test.mjs
@@ -27,7 +27,8 @@ appScenarios
       app: {
         routes: {
           'index.js': `import Route from '@ember/routing/route';
-          import { service } from '@ember/service';
+          import * as serviceModule from '@ember/service';
+          const service = serviceModule.service || serviceModule.inject;
 
           function isEmptyObject(obj) {
             return Object.keys(obj).length === 0 && obj.constructor.name === 'Object';
@@ -46,7 +47,8 @@ appScenarios
             }
           }`,
           'application.js': `import Route from '@ember/routing/route';
-          import { service } from '@ember/service';
+          import * as serviceModule from '@ember/service';
+          const service = serviceModule.service || serviceModule.inject;
 
           export default class ApplicationRoute extends Route {
             @service fastboot;
diff --git a/test-packages/test-scenarios/fastboot-shoebox-test.mjs b/test-packages/test-scenarios/fastboot-shoebox-test.mjs
index d5f7614f..99983968 100644
--- a/test-packages/test-scenarios/fastboot-shoebox-test.mjs
+++ b/test-packages/test-scenarios/fastboot-shoebox-test.mjs
@@ -13,7 +13,8 @@ appScenarios
       app: {
         routes: {
           'application.js': `import Route from '@ember/routing/route';
-          import { service } from '@ember/service'
+          import * as serviceModule from '@ember/service';
+          const service = serviceModule.service || serviceModule.inject;
 
           export default class ApplicationRoute extends Route {
             @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js b/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
index 665147db..a9301828 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/components/async-content.js
@@ -2,7 +2,8 @@ import { defer } from 'rsvp';
 import { later } from '@ember/runloop';
 import Component from '@glimmer/component';
 import { tracked } from '@glimmer/tracking';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default class AsyncContenComponent extends Component {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
index 030b7cfd..ee30823c 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/application.js
@@ -1,5 +1,6 @@
 import Route from '@ember/routing/route';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default class ApplicationRoute extends Route {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
index 6fc90f7d..aa3cf172 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/echo-request-headers.js
@@ -1,5 +1,6 @@
 import Route from '@ember/routing/route';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default class EchoRequestHeadersRoute extends Route {
   @service fastboot;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
index 5b68c009..7b9c7b87 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/head-content.js
@@ -1,6 +1,7 @@
 import { set } from '@ember/object';
 import Route from '@ember/routing/route';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default class HeadContentRoute extends Route {
   @service headData;
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
index 98e64446..8d54f129 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/metadata.js
@@ -1,5 +1,6 @@
 import Route from '@ember/routing/route';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default Route.extend({
   fastboot: service(),
diff --git a/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js b/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
index 830b1ca0..d8fe3005 100644
--- a/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
+++ b/test-packages/test-scenarios/fixtures/basic-app/app/routes/return-status-code-418.js
@@ -1,5 +1,6 @@
 import Route from '@ember/routing/route';
-import { service } from '@ember/service';
+import * as serviceModule from '@ember/service';
+const service = serviceModule.service || serviceModule.inject;
 
 export default class ReturnStatusCode418Route extends Route {
   @service fastboot;

From 3b3ff475a7e541e678f89bfc99c1a4ff5bfd2550 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <felix.buenemann@gmail.com>
Date: Sat, 22 Nov 2025 20:01:56 +0100
Subject: [PATCH 5/5] Use backwards compatible requires for
 experimental-render-mode-rehydrate

---
 .../experimental-render-mode-rehydrate.js     | 29 ++++++++++++++-----
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js b/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
index aa7d4ba4..a6d696b1 100644
--- a/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
+++ b/packages/ember-cli-fastboot/vendor/experimental-render-mode-rehydrate.js
@@ -3,21 +3,36 @@
   if (typeof FastBoot === 'undefined') {
     var current = document.getElementById('fastboot-body-start');
 
-    var _Ember = require.has('ember') ? require('ember').default : window.Ember;
-    var _ViewUtils = require.has('@ember/-internals/views') ? require('@ember/-internals/views') : _Ember.ViewUtils;
+    if (!current) {
+      return;
+    }
+
+    var isSerializationFirstNode;
+    var ApplicationInstance;
+
+    if (require.has('@ember/-internals/glimmer') && require.has('@ember/application/instance')) {
+      isSerializationFirstNode = require('@ember/-internals/glimmer').isSerializationFirstNode;
+      ApplicationInstance = require('@ember/application/instance').default;
+    } else if (require.has('ember')) {
+      var _Ember = require('ember').default;
+      isSerializationFirstNode = _Ember.ViewUtils.isSerializationFirstNode;
+      ApplicationInstance = _Ember.ApplicationInstance;
+    } else if (window.Ember) {
+      isSerializationFirstNode = window.Ember.ViewUtils.isSerializationFirstNode;
+      ApplicationInstance = window.Ember.ApplicationInstance;
+    }
 
-    if (current && !_Ember) {
+    if (!isSerializationFirstNode || !ApplicationInstance) {
       console.error(`Experimental render mode rehydrate isn't working because it couldn't find Ember via AMD or global.
 See https://github.com/ember-fastboot/ember-cli-fastboot/issues/938 for the current state of the fix.`);
       return;
     }
 
     if (
-      current &&
-      typeof _ViewUtils.isSerializationFirstNode === 'function' &&
-      _ViewUtils.isSerializationFirstNode(current.nextSibling)
+      typeof isSerializationFirstNode === 'function' &&
+      isSerializationFirstNode(current.nextSibling)
     ) {
-      _Ember.ApplicationInstance.reopen({
+      ApplicationInstance.reopen({
         _bootSync: function(options) {
           if (options === undefined) {
             options = {