diff --git a/nix/modules/customer-portal/flake-module.nix b/nix/modules/customer-portal/flake-module.nix
index f174e13..bf5ecd4 100755
--- a/nix/modules/customer-portal/flake-module.nix
+++ b/nix/modules/customer-portal/flake-module.nix
@@ -89,6 +89,7 @@
             serviceConfig = {
               ExecStart = utils.escapeSystemdExecArgs [
                 (lib.getExe pkgs.bun)
+                "--bun"
                 "run"
                 "${cfg.package}/server/index.mjs"
                 "--config"