diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 869cae81bd..a869d90b53 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -415,6 +415,7 @@ function install_begin_request($class_loader, &$install_state) {
   else {
     $environment = 'prod';
   }
+  $GLOBALS['conf']['container_service_providers']['InstallerConfigOverride'] = 'Drupal\Core\Installer\ConfigOverride';
 
   // Only allow dumping the container once the hash salt has been created.
   $kernel = InstallerKernel::createFromRequest($request, $class_loader, $environment, (bool) Settings::get('hash_salt', FALSE));
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index a8591ca989..68b10b3e42 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1322,12 +1322,6 @@ function template_preprocess_html(&$variables) {
     }
   }
 
-  // Early in the installer the site name is unknown. In this case we need to
-  // fallback to the distribution's name.
-  if (empty($head_title['name']) && drupal_installation_attempted() && function_exists('drupal_install_profile_distribution_name')) {
-    $head_title['name'] = drupal_install_profile_distribution_name();
-  }
-
   $variables['head_title'] = $head_title;
   // @deprecated in Drupal 8.0.0, will be removed before Drupal 9.0.0.
   $variables['head_title_array'] = $head_title;
diff --git a/core/lib/Drupal/Core/Installer/ConfigOverride.php b/core/lib/Drupal/Core/Installer/ConfigOverride.php
new file mode 100644
index 0000000000..f6bf966d93
--- /dev/null
+++ b/core/lib/Drupal/Core/Installer/ConfigOverride.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Drupal\Core\Installer;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Config\ConfigFactoryOverrideInterface;
+use Drupal\Core\Config\StorageInterface;
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Core\DependencyInjection\ServiceProviderInterface;
+
+/**
+ * Override configuration during the installer.
+ */
+class ConfigOverride implements ServiceProviderInterface, ConfigFactoryOverrideInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function register(ContainerBuilder $container) {
+    // Register this class so that it can override configuration.
+    $container
+      ->register('core.install_config_override', static::class)
+      ->addTag('config.factory.override');
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function loadOverrides($names) {
+    $overrides = [];
+    if (drupal_installation_attempted() && function_exists('drupal_install_profile_distribution_name')) {
+      // Early in the installer the site name is unknown. In this case we need to
+      // fallback to the distribution's name.
+      $overrides['system.site'] = [
+        'name' => drupal_install_profile_distribution_name(),
+      ];
+    }
+    return $overrides;
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function getCacheSuffix() {
+    return 'core.install_config_override';
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function createConfigObject($name, $collection = StorageInterface::DEFAULT_COLLECTION) {
+    return NULL;
+  }
+
+  /**
+   * @inheritDoc
+   */
+  public function getCacheableMetadata($name) {
+    return new CacheableMetadata();
+  }
+
+}