From 07418742dcc90228f796f7daeacb9a7ae07199bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Thu, 2 Apr 2026 19:53:05 +0200
Subject: [PATCH] nixos/collectd: allow accessing the final package with
 applied plugins and minimalPackage

This allows accessing share/collectd/types.db from the final package
required to add custom types.
---
 nixos/modules/services/monitoring/collectd.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/nixos/modules/services/monitoring/collectd.nix b/nixos/modules/services/monitoring/collectd.nix
index fc97d4f63e6c..a80f7dfafaa8 100644
--- a/nixos/modules/services/monitoring/collectd.nix
+++ b/nixos/modules/services/monitoring/collectd.nix
@@ -46,6 +46,20 @@ in
 
     package = lib.mkPackageOption pkgs "collectd" { };
 
+    finalPackage = lib.mkOption {
+      readOnly = true;
+      default = minimalPackage;
+      defaultText = lib.literalExpression ''
+        if config.services.collectd.buildMinimalPackage then
+          cfg.package.override {
+            enabledPlugins = [ "syslog" ] ++ builtins.attrNames cfg.plugins;
+          }
+        else
+          cfg.package
+      '';
+      description = "The final package being used after applying plugins and minimalPackage.";
+    };
+
     buildMinimalPackage = lib.mkOption {
       default = false;
       description = ''