diff --git a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
index 4d0f9fe..0c0cb4c 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteSettingsForm.php
@@ -176,6 +176,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       'value'    => Crypt::randomBytesBase64(55),
       'required' => TRUE,
     );
+    $settings['settings']['container_yamls'] = (object) array(
+      'value'    => ["__DIR__ . '/services.yml'"],
+      'required' => TRUE,
+    );
     // Remember the profile which was used.
     $settings['settings']['install_profile'] = (object) array(
       'value' => $install_state['parameters']['profile'],