diff --git a/.circleci/config.yml b/.circleci/config.yml
index 53e64ab9..ac4de6b0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     working_directory: ~/example
     docker:
-      - image: circleci/php:7.2-node-browsers
+      - image: circleci/php:7.3-node-browsers
       - image: circleci/mysql:5.7-ram
         command: --max_allowed_packet=16M
         environment:
@@ -73,7 +73,7 @@ jobs:
       # Create a new project using the drupal-skeleton project
       - run:
           name: Create a new Drupal project
-          command: composer create-project palantirnet/drupal-skeleton example dev-drupal8 --no-interaction
+          command: composer create-project palantirnet/drupal-skeleton example dev-drupal9 --no-interaction
           working_directory: ~/
 
       # Use this copy of the-build
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c54a79a9..c1830fbd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log
 
+## UNRELEASED
+
+### Changed
+
+* `phing install` now uses `drush site-install --existing-config` instead of the [config_installer profile](https://www.drupal.org/project/config_installer) (#145)
+
+### Deprecated
+
+* The `drupal.site.profile` property is no longer used by the default `install` target in `build.xml`. It will be removed in the 3.0 release. (#145)
+
 ## 2.3.2
 
 ### Fixed
diff --git a/defaults.yml b/defaults.yml
index b99208d8..9a0fd670 100644
--- a/defaults.yml
+++ b/defaults.yml
@@ -95,6 +95,11 @@ drupal:
       hash_salt: temporary
 
       # Drupal install profile to use for the drupal-install target.
+      #
+      # DEPRECATED - to be removed in 3.0
+      # This property was used in the 'install' target in the default build.xml, until
+      # we switched from the config_installer profile to using
+      # 'drush site-install --existing-config`.
       profile: config_installer
 
       # Drupal admin username, if you feel inclined to change it.
diff --git a/defaults/install/build.xml b/defaults/install/build.xml
index 6f2286bb..563e8149 100644
--- a/defaults/install/build.xml
+++ b/defaults/install/build.xml
@@ -72,7 +72,7 @@
             <option name="site-name">${projectname}</option>
             <option name="account-name">${drupal.site.admin_user}</option>
             <option name="account-pass">admin</option>
-            <param>${drupal.site.profile}</param>
+            <option name="existing-config" />
         </drush>
     </target>
 
diff --git a/defaults/standard/modules/the_build_utility/the_build_utility.info.yml b/defaults/standard/modules/the_build_utility/the_build_utility.info.yml
index 91cd95d4..d63104a1 100644
--- a/defaults/standard/modules/the_build_utility/the_build_utility.info.yml
+++ b/defaults/standard/modules/the_build_utility/the_build_utility.info.yml
@@ -2,6 +2,7 @@ name: the-build utility module
 description: 'Base settings from palantirnet/the-build.'
 type: module
 core: 8.x
+core_version_requirement: ^8 || ^9
 hide: true
 
 dependencies:
diff --git a/defaults/standard/modules/the_build_utility/the_build_utility.install b/defaults/standard/modules/the_build_utility/the_build_utility.install
index 72cac6b7..913472f4 100644
--- a/defaults/standard/modules/the_build_utility/the_build_utility.install
+++ b/defaults/standard/modules/the_build_utility/the_build_utility.install
@@ -19,13 +19,13 @@ use Drupal\shortcut\Entity\Shortcut;
 function the_build_utility_install() {
   // Allow visitor account creation with administrative approval.
   $user_settings = \Drupal::configFactory()->getEditable('user.settings');
-  $user_settings->set('register', USER_REGISTER_ADMINISTRATORS_ONLY)->save(TRUE);
+  $user_settings->set('register', 'admin_only')->save(TRUE);
 
   // Populate the default shortcut set.
   $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
     'title' => t('Manage Taxonomy'),
-    'weight' => -20,
+    'weight' => -18,
     'link' => ['uri' => 'internal:/admin/structure/taxonomy'],
   ]);
   $shortcut->save();
@@ -33,7 +33,7 @@ function the_build_utility_install() {
   $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
     'title' => t('Manage Menus'),
-    'weight' => -19,
+    'weight' => -17,
     'link' => ['uri' => 'internal:/admin/structure/menu'],
   ]);
   $shortcut->save();
@@ -41,7 +41,7 @@ function the_build_utility_install() {
   $shortcut = Shortcut::create([
     'shortcut_set' => 'default',
     'title' => t('Status Report'),
-    'weight' => -18,
+    'weight' => -16,
     'link' => ['uri' => 'internal:/admin/reports/status'],
   ]);
   $shortcut->save();
@@ -61,7 +61,7 @@ function the_build_utility_install() {
 
   // Begin Comment module.
   // Remove the comment fields.
-  $fields = entity_load_multiple_by_properties('field_storage_config', ['type' => 'comment']);
+  $fields = \Drupal::entityTypeManager()->getStorage('field_storage_config')->loadByProperties(['type' => 'comment']);
   foreach ($fields as $field) {
     $field->delete();
   }
diff --git a/targets/drupal.xml b/targets/drupal.xml
index ec15adfa..91ddcaa0 100644
--- a/targets/drupal.xml
+++ b/targets/drupal.xml
@@ -260,7 +260,7 @@ Or, you can specify the export file directly:
         <composer command="require" composer="${composer.composer}">
             <arg value="drupal/admin_toolbar" />
             <arg value="drupal/config_split" />
-            <arg value="drupal/devel" />
+            <arg value="drupal/devel:^3.0" />
             <arg value="drupal/workbench" />
             <arg value="drupal/workbench_tabs" />
         </composer>
@@ -276,22 +276,9 @@ Or, you can specify the export file directly:
             <param>the_build_utility</param>
         </drush>
 
-        <drush command="config-delete" assume="yes">
-            <param>core.extension</param>
-            <param>module.standard</param>
-        </drush>
-
-        <drush command="config-set" assume="yes">
-            <param>core.extension</param>
-            <param>module.config_installer</param>
-            <param>1000</param>
-        </drush>
-
-        <drush command="config-set" assume="yes">
-            <param>core.extension</param>
-            <param>profile</param>
-            <param>config_installer</param>
-        </drush>
+        <phingcall target="drupal-change-profile">
+            <property name="new_profile" value="minimal" />
+        </phingcall>
 
         <drush command="pm-uninstall" assume="yes">
             <param>the_build_utility</param>
@@ -302,12 +289,58 @@ Or, you can specify the export file directly:
         <!-- Whitespace is intentional. -->
         <echo>
 
-             Drupal has been installed with the install profile "standard". Future installs will be run using config_installer.
+             Drupal has been installed with the install profile "standard". If you'd prefer a different profile, run the installer yourself:
+               drush site-install minimal
+
+             Future installs via 'phing install' will be run using 'drush site:install --existing-config'.
 
              Your config has been exported to ${drupal.root}/${drupal.site.config_sync_directory}</echo>
     </target>
 
 
+    <target name="drupal-change-profile" description="Change the install profile on an existing Drupal site.">
+        <fail unless="new_profile" />
+
+        <!-- Get the name of the current profile. -->
+        <drush command="config-get" returnProperty="current_profile">
+            <param>core.extension</param>
+            <param>profile</param>
+            <option name="format">csv</option>
+        </drush>
+
+        <!-- If the current profile is enabled in the core extensions list, disable it. -->
+        <drush command="config-get" returnProperty="current_profile_weight">
+            <param>core.extension</param>
+            <param>module.${current_profile}</param>
+            <option name="format">csv</option>
+        </drush>
+
+        <if>
+            <not><equals arg1="${current_profile_weight}" arg2="" /></not>
+            <then>
+                <drush command="config-delete" assume="yes">
+                    <param>core.extension</param>
+                    <param>module.${current_profile}</param>
+                </drush>
+            </then>
+        </if>
+
+        <!-- Enable the new profile. -->
+        <drush command="config-set" assume="yes">
+            <param>core.extension</param>
+            <param>module.${new_profile}</param>
+            <param>1000</param>
+        </drush>
+
+        <!-- Update the profile setting itself. -->
+        <drush command="config-set" assume="yes">
+            <param>core.extension</param>
+            <param>profile</param>
+            <param>${new_profile}</param>
+        </drush>
+    </target>
+
+
     <target name="drupal-add-multisite" description="Set up a new Drupal multisite.">
         <if>
             <equals arg1="${build.host}" arg2="pantheon" />