pantheon.elementary-settings-daemon: fix #14168

Is the same fix as in #57620 just for Pantheon's settings daemon.

pkgs/desktops/pantheon/services/elementary-settings-daemon/default.nix

@@ -66,6 +66,7 @@ stdenv.mkDerivation rec {
       src = ./fix-paths.patch;
       inherit tzdata mousetweaks;
     })
+    ./global-backlight-helper.patch
     "${patchPath}/45_suppress-printer-may-not-be-connected-notification.patch"
     "${patchPath}/64_restore_terminal_keyboard_shortcut_schema.patch"
     "${patchPath}/correct_logout_action.patch"
@@ -98,6 +99,10 @@ stdenv.mkDerivation rec {
     # This breaks lightlocker https://github.com/elementary/session-settings/commit/b0e7a2867608c3a3916f9e4e21a68264a20e44f8
     # TODO: shouldn't be neeed for the 5.1 greeter (awaiting release)
     rm $out/etc/xdg/autostart/org.gnome.SettingsDaemon.ScreensaverProxy-pantheon.desktop
+
+    # So the polkit policy can reference /run/current-system/sw/bin/elementary-settings-daemon/gsd-backlight-helper
+    mkdir -p $out/bin/elementary-settings-daemon
+    ln -s $out/libexec/gsd-backlight-helper $out/bin/elementary-settings-daemon/gsd-backlight-helper
   '';
 
   nativeBuildInputs = [

pkgs/desktops/pantheon/services/elementary-settings-daemon/global-backlight-helper.patch

@@ -0,0 +1,26 @@
+diff --git a/plugins/power/gsd-backlight.c b/plugins/power/gsd-backlight.c
+index d7d10fd2..5619d6ad 100644
+--- a/plugins/power/gsd-backlight.c
++++ b/plugins/power/gsd-backlight.c
+@@ -358,7 +358,7 @@ gsd_backlight_run_set_helper (GsdBacklight *backlight, GTask *task)
+                 proc = g_subprocess_new (G_SUBPROCESS_FLAGS_STDOUT_SILENCE,
+                                          &error,
+                                          "pkexec",
+-                                         LIBEXECDIR "/gsd-backlight-helper",
++                                         "/run/current-system/sw/bin/elementary-settings-daemon/gsd-backlight-helper",
+                                          g_udev_device_get_sysfs_path (backlight->udev_device),
+                                          data->value_str, NULL);
+         } else {
+diff --git a/plugins/power/org.gnome.settings-daemon.plugins.power.policy.in.in b/plugins/power/org.gnome.settings-daemon.plugins.power.policy.in.in
+index f16300f8..79d6bd17 100644
+--- a/plugins/power/org.gnome.settings-daemon.plugins.power.policy.in.in
++++ b/plugins/power/org.gnome.settings-daemon.plugins.power.policy.in.in
+@@ -25,7 +25,7 @@
+       <allow_inactive>no</allow_inactive>
+       <allow_active>yes</allow_active>
+     </defaults>
+-    <annotate key="org.freedesktop.policykit.exec.path">@libexecdir@/gsd-backlight-helper</annotate>
++    <annotate key="org.freedesktop.policykit.exec.path">/run/current-system/sw/bin/elementary-settings-daemon/gsd-backlight-helper</annotate>
+   </action>
+
+ </policyconfig>