diff --git a/frameworks/drupal/10.yaml b/frameworks/drupal/10.yaml
index c1b873a..f824c63 100644
--- a/frameworks/drupal/10.yaml
+++ b/frameworks/drupal/10.yaml
@@ -35,6 +35,9 @@ env:
       - databases.default.default.database=sites/default/files/.ht.sqlite
       - 'databases.default.default.namespace=Drupal\sqlite\Driver\Database\sqlite'
       - databases.default.default.autoload=core/modules/sqlite/src/Driver/Database/sqlite/
+  # A recommended-project scaffold names no database driver until its installer
+  # runs, so nothing is detected; wire it to MySQL. Older binaries ignore this.
+  default_service: mysql
   services:
     mysql:
       detect:
diff --git a/frameworks/drupal/11.yaml b/frameworks/drupal/11.yaml
index e9563bc..ee0f31f 100644
--- a/frameworks/drupal/11.yaml
+++ b/frameworks/drupal/11.yaml
@@ -35,6 +35,9 @@ env:
       - databases.default.default.database=sites/default/files/.ht.sqlite
       - 'databases.default.default.namespace=Drupal\sqlite\Driver\Database\sqlite'
       - databases.default.default.autoload=core/modules/sqlite/src/Driver/Database/sqlite/
+  # A recommended-project scaffold names no database driver until its installer
+  # runs, so nothing is detected; wire it to MySQL. Older binaries ignore this.
+  default_service: mysql
   services:
     mysql:
       detect:
diff --git a/frameworks/drupal/8.yaml b/frameworks/drupal/8.yaml
index db541f2..f38f408 100644
--- a/frameworks/drupal/8.yaml
+++ b/frameworks/drupal/8.yaml
@@ -35,6 +35,9 @@ env:
       - databases.default.default.database=sites/default/files/.ht.sqlite
       - 'databases.default.default.namespace=Drupal\sqlite\Driver\Database\sqlite'
       - databases.default.default.autoload=core/modules/sqlite/src/Driver/Database/sqlite/
+  # A recommended-project scaffold names no database driver until its installer
+  # runs, so nothing is detected; wire it to MySQL. Older binaries ignore this.
+  default_service: mysql
   services:
     mysql:
       detect:
diff --git a/frameworks/drupal/9.yaml b/frameworks/drupal/9.yaml
index de11a7c..8c59bd2 100644
--- a/frameworks/drupal/9.yaml
+++ b/frameworks/drupal/9.yaml
@@ -35,6 +35,9 @@ env:
       - databases.default.default.database=sites/default/files/.ht.sqlite
       - 'databases.default.default.namespace=Drupal\sqlite\Driver\Database\sqlite'
       - databases.default.default.autoload=core/modules/sqlite/src/Driver/Database/sqlite/
+  # A recommended-project scaffold names no database driver until its installer
+  # runs, so nothing is detected; wire it to MySQL. Older binaries ignore this.
+  default_service: mysql
   services:
     mysql:
       detect: