diff --git a/flake.nix b/flake.nix
index 0cb78e5..efd0448 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,7 +29,9 @@
 
       defaultPackage = self.packages."${system}".fudo-pricebot;
 
-      nixosModule = import ./module.nix self.packages."${system}".fudo-pricebot;
+      nixosModule = builtins.callPackage ./module.nix {
+        pricebot = self.packages."${system}".fudo-pricebot;
+      };
 
       devShell =
         pkgs.mkShell { buildInputs = with pkgs; [ clojure update-deps ]; };
diff --git a/module.nix b/module.nix
index 8ef70ed..8c17647 100644
--- a/module.nix
+++ b/module.nix
@@ -1,5 +1,4 @@
-pricebot-jar:
-{ config, lib, pkgs, ... }:
+{ pricebot, config, lib, pkgs, ... }:
 
 with lib;
 let
@@ -69,7 +68,7 @@ in {
           PRICEBOT_NOTIFY_USER = opts.notify-user;
         };
         serviceConfig = {
-          ExecStart = "${pkgs.jre}/bin/java -jar ${pricebot-jar}";
+          ExecStart = "${pricebot}/bin/pricebot";
           ExecStartPre =
             "+${pkgs.coreutils-full}/bin/install --owner=%u --mode=400 -T ${cfg.mattermost-auth-token-file} %T/auth.token";
           DynamicUser = true;