From c4bec8d7b02567da2d130d373b25a3adbcabdff9 Mon Sep 17 00:00:00 2001
From: Arnout Engelen <arnout@bzzt.net>
Date: Sun, 14 Dec 2025 12:49:47 +0100
Subject: [PATCH] kdePackages.powerdevil: fix build nondeterminism

Cherry-pick
https://invent.kde.org/plasma/powerdevil/-/merge_requests/595 for
wider testing

Fixes #467100
---
 pkgs/kde/plasma/powerdevil/default.nix        |  4 ++++
 .../kde/plasma/powerdevil/rb-brightness.patch | 24 +++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 pkgs/kde/plasma/powerdevil/rb-brightness.patch

diff --git a/pkgs/kde/plasma/powerdevil/default.nix b/pkgs/kde/plasma/powerdevil/default.nix
index ae2b56a004f2..095a45beb866 100644
--- a/pkgs/kde/plasma/powerdevil/default.nix
+++ b/pkgs/kde/plasma/powerdevil/default.nix
@@ -7,6 +7,10 @@
 mkKdeDerivation {
   pname = "powerdevil";
 
+  patches = [
+    # https://invent.kde.org/plasma/powerdevil/-/merge_requests/595
+    ./rb-brightness.patch
+  ];
   extraNativeBuildInputs = [ pkg-config ];
   extraBuildInputs = [
     ddcutil
diff --git a/pkgs/kde/plasma/powerdevil/rb-brightness.patch b/pkgs/kde/plasma/powerdevil/rb-brightness.patch
new file mode 100644
index 000000000000..a73692a2cb9b
--- /dev/null
+++ b/pkgs/kde/plasma/powerdevil/rb-brightness.patch
@@ -0,0 +1,24 @@
+commit a34d894278d2c7938427d3c4d0fc07d96c26e55f
+Author: Arnout Engelen <arnout@bzzt.net>
+Date:   Sun Dec 14 11:33:08 2025 +0100
+
+    reproducible builds: make build deterministic by adding explicit deps
+    
+    Similar to https://qt-project.atlassian.net/browse/QTBUG-137440
+    
+    To fix https://bugs.kde.org/show_bug.cgi?id=512867
+    
+    I'll admit I don't quite know what I'm doing here, I'm mostly guessing and mimicking, but it does seem to remove the nondeterminism :)
+    
+    Inspired in part by https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/6075/diffs
+
+diff --git a/applets/brightness/CMakeLists.txt b/applets/brightness/CMakeLists.txt
+index 3d1fce43..99331f85 100644
+--- a/applets/brightness/CMakeLists.txt
++++ b/applets/brightness/CMakeLists.txt
+@@ -16,3 +16,5 @@ plasma_add_applet(org.kde.plasma.brightness
+         PopupDialog.qml
+     GENERATE_APPLET_CLASS
+ )
++
++add_dependencies(org.kde.plasma.brightness brightnesscontrolplugin)