From 90bdf7c4cbae888687e49766197ecee4751afce9 Mon Sep 17 00:00:00 2001
From: Jeremy Fleischman <jeremyfleischman@gmail.com>
Date: Thu, 29 Jan 2026 19:04:31 -0800
Subject: [PATCH] nixos/prometheus/mqtt-exporter: add `package` option

---
 .../modules/services/monitoring/prometheus/exporters/mqtt.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/monitoring/prometheus/exporters/mqtt.nix b/nixos/modules/services/monitoring/prometheus/exporters/mqtt.nix
index f9fbb3d323da..6029a9a4bf1c 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/mqtt.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/mqtt.nix
@@ -11,6 +11,7 @@ let
     mkIf
     mkEnableOption
     mkOption
+    mkPackageOption
     types
     ;
   cfg = config.services.prometheus.exporters.mqtt;
@@ -21,6 +22,7 @@ in
   # https://github.com/kpetremann/mqtt-exporter/tree/master?tab=readme-ov-file#configuration
   port = 9000;
   extraOpts = {
+    package = mkPackageOption pkgs "mqtt-exporter" { };
     keepFullTopic = mkEnableOption "Keep entire topic instead of the first two elements only. Usecase: Shelly 3EM";
     logLevel = mkOption {
       type = types.enum [
@@ -134,7 +136,7 @@ in
     };
     serviceConfig = {
       EnvironmentFile = mkIf (cfg.environmentFile != null) cfg.environmentFile;
-      ExecStart = lib.getExe pkgs.mqtt-exporter;
+      ExecStart = lib.getExe cfg.package;
     };
   };
 }