From 4677729c56baa64814a0e0cff4cf999cf543e343 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Tue, 2 Apr 2024 18:14:50 +0200
Subject: [PATCH] nixos/udev: only load firmware from udev when the nixos
 kernel is used

This is not the case for eg. NixOS in WSL
---
 nixos/modules/services/hardware/udev.nix | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/nixos/modules/services/hardware/udev.nix b/nixos/modules/services/hardware/udev.nix
index e442f7c669dd..913babd94782 100644
--- a/nixos/modules/services/hardware/udev.nix
+++ b/nixos/modules/services/hardware/udev.nix
@@ -421,19 +421,17 @@ in
       (isYes "NET")
     ];
 
+    system.activationScripts.udevd = lib.mkIf config.boot.kernel.enable ''
+      # The deprecated hotplug uevent helper is not used anymore
+      if [ -e /proc/sys/kernel/hotplug ]; then
+        echo "" > /proc/sys/kernel/hotplug
+      fi
 
-    system.activationScripts.udevd =
-      ''
-        # The deprecated hotplug uevent helper is not used anymore
-        if [ -e /proc/sys/kernel/hotplug ]; then
-          echo "" > /proc/sys/kernel/hotplug
-        fi
-
-        # Allow the kernel to find our firmware.
-        if [ -e /sys/module/firmware_class/parameters/path ]; then
-          echo -n "${config.hardware.firmware}/lib/firmware" > /sys/module/firmware_class/parameters/path
-        fi
-      '';
+      # Allow the kernel to find our firmware.
+      if [ -e /sys/module/firmware_class/parameters/path ]; then
+        echo -n "${config.hardware.firmware}/lib/firmware" > /sys/module/firmware_class/parameters/path
+      fi
+    '';
 
     systemd.services.systemd-udevd =
       { restartTriggers = cfg.packages;