From 168bc6f699151c900471c75b4267e4edbba4527b Mon Sep 17 00:00:00 2001
From: Bobby Rong <rjl931189261@126.com>
Date: Sat, 11 Jul 2026 19:31:06 +0800
Subject: [PATCH 1/2] nixos/mate: Opt into pkexec

https://github.com/mate-desktop/mate-power-manager/blob/v1.28.1/src/gpm-brightness.c#L162
Same as 29e29c39b151f037.
---
 nixos/modules/services/x11/desktop-managers/mate.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/nixos/modules/services/x11/desktop-managers/mate.nix b/nixos/modules/services/x11/desktop-managers/mate.nix
index 764e903cc2c5..be5ed185e68d 100644
--- a/nixos/modules/services/x11/desktop-managers/mate.nix
+++ b/nixos/modules/services/x11/desktop-managers/mate.nix
@@ -141,6 +141,10 @@ in
       services.libinput.enable = mkDefault true;
 
       security.pam.services.mate-screensaver.unixAuth = true;
+      security.polkit = {
+        enable = true;
+        enablePkexecWrapper = mkDefault true;
+      };
 
       xdg.portal.configPackages = mkDefault [ pkgs.mate-desktop ];
 

From b27618bc1e638e418d19317111a54a2bef0fbbc8 Mon Sep 17 00:00:00 2001
From: Bobby Rong <rjl931189261@126.com>
Date: Sat, 11 Jul 2026 19:03:16 +0800
Subject: [PATCH 2/2] mate-power-manager: Fix backlight-helper polkit popup

Same as 4d9714d7c9e07f5f.
---
 pkgs/by-name/ma/mate-power-manager/package.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/ma/mate-power-manager/package.nix b/pkgs/by-name/ma/mate-power-manager/package.nix
index 9f67b36f661b..a46e9e41daee 100644
--- a/pkgs/by-name/ma/mate-power-manager/package.nix
+++ b/pkgs/by-name/ma/mate-power-manager/package.nix
@@ -56,7 +56,16 @@ stdenv.mkDerivation (finalAttrs: {
     mate-panel
   ];
 
-  configureFlags = [ "--enable-applets" ];
+  configureFlags = [
+    "--enable-applets"
+    "--sbindir=$(out)/bin"
+  ];
+
+  postPatch = ''
+    # Fixes polkit popup after `nixos-rebuild switch`.
+    substituteInPlace src/gpm-brightness.c \
+      --replace-fail 'SBINDIR "/mate-power-backlight-helper' '"/run/current-system/sw/bin/mate-power-backlight-helper'
+  '';
 
   enableParallelBuilding = true;