mir: Pull patch to fix evdev device misses

nixos/tests/miriway.nix

@@ -3,11 +3,6 @@ import ./make-test-python.nix ({ pkgs, lib, ... }: {
 
   meta = {
     maintainers = with lib.maintainers; [ OPNA2608 ];
-    # Natively running Mir has problems with capturing the first registered libinput device.
-    # In our VM  runners on ARM and on some hardware configs (my RPi4, distro-independent), this misses the keyboard.
-    # It can be worked around by dis- and reconnecting the affected hardware, but we can't do this in these tests.
-    # https://github.com/MirServer/mir/issues/2837
-    broken = pkgs.stdenv.hostPlatform.isAarch;
   };
 
   nodes.machine = { config, ... }: {

pkgs/servers/mir/default.nix

@@ -1,6 +1,7 @@
 { stdenv
 , lib
 , fetchFromGitHub
+, fetchpatch
 , gitUpdater
 , cmake
 , pkg-config
@@ -57,6 +58,16 @@ stdenv.mkDerivation rec {
     hash = "sha256-Ip8p4mjcgmZQJTU4MNvWkTTtSJc+cCL3x1mMDFlZrVY=";
   };
 
+  patches = [
+    # Fixes Mir being able to drop first input device on launch
+    # Drop when https://github.com/MirServer/mir/issues/2837 fixed in a release
+    (fetchpatch {
+      name = "0001-mir-Simplify_probing_of_evdev_input_platform.patch";
+      url = "https://github.com/MirServer/mir/commit/7787cfa721934bb43d3255218e7c92e700923fcb.patch";
+      hash = "sha256-9C9qcmngd+K8EAcyOYUJFTdFDu1Nt1MM7Y9TRNOXFB4=";
+    })
+  ];
+
   postPatch = ''
     # Fix scripts that get run in tests
     patchShebangs tools/detect_fd_leaks.bash tests/acceptance-tests/wayland-generator/test_wayland_generator.sh.in