Install dependencies by creating a meta package on-the-fly (#5785)

advanced/Scripts/update.sh

@@ -109,7 +109,8 @@ main() {
 
     # Install packages used by this installation script (necessary if users have removed e.g. git from their systems)
     package_manager_detect
-    install_dependent_packages "${INSTALLER_DEPS[@]}"
+    build_dependency_package
+    install_dependent_packages
 
     # This is unlikely
     if ! is_repo "${PI_HOLE_FILES_DIR}" ; then