diff --git a/src/wp-admin/includes/class-theme-installer-skin.php b/src/wp-admin/includes/class-theme-installer-skin.php
index 91c3a50088..cfbc8a6ecb 100644
--- a/src/wp-admin/includes/class-theme-installer-skin.php
+++ b/src/wp-admin/includes/class-theme-installer-skin.php
@@ -115,7 +115,7 @@ class Theme_Installer_Skin extends WP_Upgrader_Skin {
 
 		$install_actions = array();
 
-		if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
+		if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) && ! $theme_info->is_block_theme() ) {
 			$customize_url = add_query_arg(
 				array(
 					'theme'  => urlencode( $stylesheet ),