diff --git a/targets/install.xml b/targets/install.xml
index 9a3ad322..e4b3782b 100644
--- a/targets/install.xml
+++ b/targets/install.xml
@@ -142,6 +142,16 @@
                 <!-- The one that's available is the location we're moving from. -->
                 <available file="${build.dir}/web/core" type="dir" property="drupal.root.old" value="web" />
                 <available file="${build.dir}/docroot/core" type="dir" property="drupal.root.old" value="docroot" />
+                <available file="${build.dir}/${drupal.root.old}/sites/default/settings.ddev.php" type="file" property="ddev_settings_exists" value="true" />
+
+                <!-- Copy settings.ddev.php if it doesn't exist in the old drupal root. -->
+                <if>
+                    <not><equals arg1="${ddev_settings_exists}" arg2="1" /></not>
+                    <then>
+                        <echo msg="Copying settings.ddev.php to old drupal root." />
+                        <exec command="cp ${drupal.root}/sites/default/settings.ddev.php ${drupal.root.old}/sites/default" dir="${build.dir}" checkreturn="true" logoutput="true" />
+                    </then>
+                </if>
 
                 <echo msg="Moving the ${drupal.root.old}/ directory to ${drupal.root}/" />
                 <exec command="rm -rf ${drupal.root}" dir="${build.dir}" />