From d1eeb643e21fa5ed00cb892df181791920d2b94a Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Sun, 11 Oct 2020 16:40:55 +0000
Subject: [PATCH] =?UTF-8?q?gnome3.mutter:=203.38.0=20=E2=86=92=203.38.1?=
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https://ftp.gnome.org/pub/GNOME/sources/mutter/3.38/mutter-3.38.1.news

It requires some udev rules on some devices.
---
 nixos/modules/services/x11/desktop-managers/gnome3.nix | 6 ++++++
 pkgs/desktops/gnome-3/core/mutter/default.nix          | 7 +++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/x11/desktop-managers/gnome3.nix b/nixos/modules/services/x11/desktop-managers/gnome3.nix
index 54d9c6bdc8c2..4ace32dc96a1 100644
--- a/nixos/modules/services/x11/desktop-managers/gnome3.nix
+++ b/nixos/modules/services/x11/desktop-managers/gnome3.nix
@@ -295,6 +295,12 @@ in
         gnome-shell
       ];
 
+      services.udev.packages = with pkgs.gnome3; [
+        # Force enable KMS modifiers for devices that require them.
+        # https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1443
+        mutter
+      ];
+
       services.avahi.enable = mkDefault true;
 
       xdg.portal.extraPortals = [
diff --git a/pkgs/desktops/gnome-3/core/mutter/default.nix b/pkgs/desktops/gnome-3/core/mutter/default.nix
index 28e8608db4f4..35d2822e8fb0 100644
--- a/pkgs/desktops/gnome-3/core/mutter/default.nix
+++ b/pkgs/desktops/gnome-3/core/mutter/default.nix
@@ -42,13 +42,13 @@
 
 let self = stdenv.mkDerivation rec {
   pname = "mutter";
-  version = "3.38.0";
+  version = "3.38.1";
 
   outputs = [ "out" "dev" "man" ];
 
   src = fetchurl {
     url = "mirror://gnome/sources/mutter/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "1aqfv7f3vsjghjy5bk50ck1pi92hc3368mgsnvlx719020yx33h5";
+    sha256 = "0cvs47h7xhalkh8xcchllaws212ml3d23aj0pmfq0qyzkw65f8g9";
   };
 
   patches = [
@@ -124,6 +124,9 @@ let self = stdenv.mkDerivation rec {
     ${glib.dev}/bin/glib-compile-schemas "$out/share/glib-2.0/schemas"
   '';
 
+  # Install udev files into our own tree.
+  PKG_CONFIG_UDEV_UDEVDIR = "${placeholder "out"}/lib/udev";
+
   passthru = {
     libdir = "${self}/lib/mutter-6";