diff --git a/scripts/upgrade b/scripts/upgrade
index 57025d0..9584780 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -69,7 +69,7 @@ ynh_script_progression --message="Building app..."
 
 pushd "$install_dir"
 	ynh_use_nodejs
-	ynh_exec_warn_less ynh_npm install --production
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm install --production
 popd
 
 #=================================================