diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 6f7955a76b..abae69842e 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -194,7 +194,7 @@ function install_state_defaults() {
     // Partial configuration cached during an installation from existing config.
     'config' => NULL,
     // The path to the configuration to install when installing from config.
-    'config_install' => NULL,
+    'config_install_path' => NULL,
     // TRUE when there are valid config directories.
     'config_verified' => FALSE,
     // TRUE when there is a valid database connection.
@@ -462,15 +462,13 @@ function install_begin_request($class_loader, &$install_state) {
   }
 
   // Use the language from profile configuration if available.
-  if (!empty($install_state['config_install']) && $install_state['config']['system.site']) {
+  if (!empty($install_state['config_install_path']) && $install_state['config']['system.site']) {
     $install_state['parameters']['langcode'] = $install_state['config']['system.site']['default_langcode'];
   }
-  else {
+  elseif (isset($install_state['profile_info']['distribution']['langcode'])) {
     // Otherwise, Use the language from the profile configuration, if available,
     // to override the language previously set in the parameters.
-    if (isset($install_state['profile_info']['distribution']['langcode'])) {
-      $install_state['parameters']['langcode'] = $install_state['profile_info']['distribution']['langcode'];
-    }
+    $install_state['parameters']['langcode'] = $install_state['profile_info']['distribution']['langcode'];
   }
 
   // Set the default language to the selected language, if any.
@@ -806,7 +804,7 @@ function install_tasks($install_state) {
     ],
   ];
 
-  if (!empty($install_state['config_install'])) {
+  if (!empty($install_state['config_install_path'])) {
     // The chosen profile indicates that rather than installing a new site, an
     // instance of the same site should be installed from the given
     // configuration.
@@ -1508,8 +1506,8 @@ function install_load_profile(&$install_state) {
   $install_state['profile_info'] = install_profile_info($profile, isset($install_state['parameters']['langcode']) ? $install_state['parameters']['langcode'] : 'en');
   // If the profile has a config/sync directory copy the information to the
   // install_state global.
-  if (!empty($install_state['profile_info']['config_install'])) {
-    $install_state['config_install'] = $install_state['profile_info']['config_install'];
+  if (!empty($install_state['profile_info']['config_install_path'])) {
+    $install_state['config_install_path'] = $install_state['profile_info']['config_install_path'];
     if (!empty($install_state['profile_info']['config'])) {
       $install_state['config'] = $install_state['profile_info']['config'];
     }
@@ -2390,7 +2388,6 @@ function install_config_import_batch_finish($success, $results, $operations) {
   }
 }
 
-
 /**
  * Replaces install_download_translation() during configuration installs.
  *
@@ -2410,7 +2407,6 @@ function install_config_download_translations(&$install_state) {
   }
 }
 
-
 /**
  * Fixes configuration if the install profile has made changes in hook_install().
  */
diff --git a/core/includes/install.inc b/core/includes/install.inc
index a5d15783f6..5f9ded0b7b 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -489,14 +489,14 @@ function drupal_install_config_directories() {
   // If settings.php does not contain a config sync directory name we need to
   // configure one.
   if (empty($config_directories[CONFIG_SYNC_DIRECTORY])) {
-    if (empty($install_state['config_install'])) {
+    if (empty($install_state['config_install_path'])) {
       // Add a randomized config directory name to settings.php
       $config_directories[CONFIG_SYNC_DIRECTORY] = \Drupal::service('site.path') . '/files/config_' . Crypt::randomBytesBase64(55) . '/sync';
     }
     else {
       // Install profiles can contain a config sync directory. If they do,
-      // 'config_install' is a path to the directory.
-      $config_directories[CONFIG_SYNC_DIRECTORY] = $install_state['config_install'];
+      // 'config_install_path' is a path to the directory.
+      $config_directories[CONFIG_SYNC_DIRECTORY] = $install_state['config_install_path'];
     }
     $settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) [
       'value' => $config_directories[CONFIG_SYNC_DIRECTORY],
@@ -1090,7 +1090,7 @@ function install_profile_info($profile, $langcode = 'en') {
       'version' => NULL,
       'hidden' => FALSE,
       'php' => DRUPAL_MINIMUM_PHP,
-      'config_install' => NULL,
+      'config_install_path' => NULL,
     ];
     $profile_path = drupal_get_path('profile', $profile);
     $info = \Drupal::service('info_parser')->parse($profile_path . "/$profile.info.yml");
@@ -1106,7 +1106,7 @@ function install_profile_info($profile, $langcode = 'en') {
 
     // If the profile has a config/sync directory use that to install drupal.
     if (is_dir($profile_path . '/config/sync')) {
-      $info['config_install'] = $profile_path . '/config/sync';
+      $info['config_install_path'] = $profile_path . '/config/sync';
       $sync = new FileStorage($profile_path . '/config/sync');
       $info['config']['system.site'] = $sync->read('system.site');
     }
diff --git a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
index 79c073b70f..d7e6c4b880 100644
--- a/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
+++ b/core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php
@@ -148,14 +148,14 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['site_information'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Site information'),
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $form['site_information']['site_name'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Site name'),
       '#required' => TRUE,
       '#weight' => -20,
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $form['site_information']['site_mail'] = [
       '#type' => 'email',
@@ -164,7 +164,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#description' => $this->t("Automated emails, such as registration information, will be sent from this address. Use an address ending in your site's domain to help prevent these emails from being flagged as spam."),
       '#required' => TRUE,
       '#weight' => -15,
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
 
     $form['admin_account'] = [
@@ -194,7 +194,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $form['regional_settings'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Regional settings'),
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $countries = $this->countryManager->getList();
     $form['regional_settings']['site_default_country'] = [
@@ -205,7 +205,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#options' => $countries,
       '#description' => $this->t('Select the default country for the site.'),
       '#weight' => 0,
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $form['regional_settings']['date_default_timezone'] = [
       '#type' => 'select',
@@ -216,20 +216,20 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#description' => $this->t('By default, dates in this site will be displayed in the chosen time zone.'),
       '#weight' => 5,
       '#attributes' => ['class' => ['timezone-detect']],
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
 
     $form['update_notifications'] = [
       '#type' => 'fieldgroup',
       '#title' => $this->t('Update notifications'),
       '#description' => $this->t('The system will notify you when updates and important security releases are available for installed components. Anonymous information about your site is sent to <a href=":drupal">Drupal.org</a>.', [':drupal' => 'https://www.drupal.org']),
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $form['update_notifications']['enable_update_status_module'] = [
       '#type' => 'checkbox',
       '#title' => $this->t('Check for updates automatically'),
       '#default_value' => 1,
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
     $form['update_notifications']['enable_update_status_emails'] = [
       '#type' => 'checkbox',
@@ -240,7 +240,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           'input[name="enable_update_status_module"]' => ['checked' => TRUE],
         ],
       ],
-      '#access' => empty($install_state['config_install']),
+      '#access' => empty($install_state['config_install_path']),
     ];
 
     $form['actions'] = ['#type' => 'actions'];
@@ -269,7 +269,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
   public function submitForm(array &$form, FormStateInterface $form_state) {
     global $install_state;
 
-    if (empty($install_state['config_install'])) {
+    if (empty($install_state['config_install_path'])) {
       $this->config('system.site')
         ->set('name', (string) $form_state->getValue('site_name'))
         ->set('mail', (string) $form_state->getValue('site_mail'))
@@ -285,7 +285,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
 
     // Enable update.module if this option was selected.
     $update_status_module = $form_state->getValue('enable_update_status_module');
-    if (empty($install_state['config_install']) && $update_status_module) {
+    if (empty($install_state['config_install_path']) && $update_status_module) {
       $this->moduleInstaller->install(['file', 'update'], FALSE);
 
       // Add the site maintenance account's email address to the list of
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingConfigNoConfigTest.php b/core/modules/system/src/Tests/Installer/InstallerExistingConfigNoConfigTest.php
index 2e7fdbce06..0a726ff86d 100644
--- a/core/modules/system/src/Tests/Installer/InstallerExistingConfigNoConfigTest.php
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingConfigNoConfigTest.php
@@ -3,7 +3,7 @@
 namespace Drupal\system\Tests\Installer;
 
 /**
- * Verifies that installing from existing configuration works.
+ * Verifies that profiles invalid config can not be installed.
  *
  * @group Installer
  */
@@ -26,6 +26,9 @@ protected function getConfigTarball() {
     return __DIR__ . '/../../../tests/fixtures/config_install/testing_config_install_no_config.tar.gz';
   }
 
+  /**
+   * Tests that profiles with an empty config/sync directory do not work.
+   */
   public function testConfigSync() {
     $this->assertTitle('Configuration validation | Drupal');
     $this->assertText('The configuration synchronization failed validation.');
diff --git a/core/modules/system/src/Tests/Installer/InstallerExistingConfigProfileHookInstall.php b/core/modules/system/src/Tests/Installer/InstallerExistingConfigProfileHookInstall.php
new file mode 100644
index 0000000000..fd56c6cf3f
--- /dev/null
+++ b/core/modules/system/src/Tests/Installer/InstallerExistingConfigProfileHookInstall.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Drupal\system\Tests\Installer;
+
+/**
+ * Verifies that profiles with hook_install() can't be installed from config.
+ *
+ * @group Installer
+ */
+class InstallerExistingConfigProfileHookInstall extends InstallerExistingConfigTestBase {
+
+  protected $profile = 'config_profile_with_hook_install';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function visitInstaller() {
+    // Create an .install file with a hook_install() implementation.
+    $path = $this->siteDirectory . '/profiles/' . $this->profile;
+    $contents = <<<EOF
+<?php
+
+function config_profile_with_hook_install_install() {
+}
+EOF;
+    file_put_contents("$path/{$this->profile}.install", $contents);
+    parent::visitInstaller();
+  }
+
+  /**
+   * Installer step: Configure settings.
+   */
+  protected function setUpSettings() {
+    // There are errors therefore there is nothing to do here.
+    return;
+  }
+
+  /**
+   * Final installer step: Configure site.
+   */
+  protected function setUpSite() {
+    // There are errors therefore there is nothing to do here.
+    return;
+  }
+
+  /**
+   * @inheritDoc
+   */
+  protected function getConfigTarball() {
+    // We're not going to get to the config import stage so this does not
+    // matter.
+    return __DIR__ . '/../../../tests/fixtures/config_install/testing_config_install_no_config.tar.gz';
+  }
+
+  public function testConfigSync() {
+    $this->assertTitle('Requirements problem | Drupal');
+    $this->assertText($this->profile);
+    $this->assertText('The selected profile has a hook_install() implementation and therefore can not be installed from configuration.');
+  }
+
+}
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index ef6f124f51..2e69787549 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -993,6 +993,19 @@ function system_requirements($phase) {
     ];
   }
 
+  // During installs from configuration don't support install profiles that
+  // implement hook_install.
+  if ($phase == 'install' && !empty($install_state['config_install_path'])) {
+    $install_hook = $install_state['parameters']['profile'] . '_install';
+    if (function_exists($install_hook)) {
+      $requirements['config_install'] = [
+        'title' => t('Configuration install'),
+        'value' => $install_state['parameters']['profile'],
+        'description' => t('The selected profile has a hook_install() implementation and therefore can not be installed from configuration.'),
+        'severity' => REQUIREMENT_ERROR,
+      ];
+    }
+  }
   return $requirements;
 }