diff --git a/modules/matrix-alertmanager-receiver.nix b/modules/matrix-alertmanager-receiver.nix
index 7e2b5b3..e5cf7f5 100644
--- a/modules/matrix-alertmanager-receiver.nix
+++ b/modules/matrix-alertmanager-receiver.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ...}:
+{ config, lib, pkgs, ... }:
 let
   cfg = config.services.matrix-alertmanager-receiver;
 in
@@ -6,6 +6,8 @@ in
   options.services.matrix-alertmanager-receiver = {
     enable = lib.mkEnableOption "matrix-alertmanager-receiver, a Matrix bridge for Alertmanager webhooks";
 
+    package = lib.mkPackageOption pkgs "matrix-alertmanager-receiver" { };
+
     configFile = lib.mkOption {
       type = lib.types.path;
       default = "";
@@ -30,7 +32,7 @@ in
       serviceConfig = {
         DynamicUser = true;
         User = "matrix-alertmanager-receiver";
-        ExecStart = "${pkgs.matrix-alertmanager-receiver}/bin/matrix-alertmanager-receiver -config ${cfg.configFile}";
+        ExecStart = "${cfg.package}/bin/matrix-alertmanager-receiver -config ${cfg.configFile}";
       };
     };
   };