From b9e09271b76a01bce3dd6ec276c1fbd42c396b89 Mon Sep 17 00:00:00 2001
From: dramforever <dramforever@live.com>
Date: Mon, 25 Aug 2025 14:15:22 +0800
Subject: [PATCH] linuxPackages.v4l2loopback: Fix makeFlags for utils

Do not pass makeFlags to the utils build. It only works with building
kernel modules.

Fixes #436300.
---
 pkgs/os-specific/linux/v4l2loopback/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/os-specific/linux/v4l2loopback/default.nix b/pkgs/os-specific/linux/v4l2loopback/default.nix
index a43048ea1c49..6ca2efdfc275 100644
--- a/pkgs/os-specific/linux/v4l2loopback/default.nix
+++ b/pkgs/os-specific/linux/v4l2loopback/default.nix
@@ -32,6 +32,11 @@ stdenv.mkDerivation {
     sed -i '/depmod/d' Makefile
   '';
 
+  # Don't use makeFlags for this
+  postBuild = ''
+    make utils
+  '';
+
   nativeBuildInputs = [ kmod ] ++ kernel.moduleBuildDependencies;
 
   postInstall = ''
@@ -46,6 +51,7 @@ stdenv.mkDerivation {
   makeFlags = kernelModuleMakeFlags ++ [
     "KERNELRELEASE=${kernel.modDirVersion}"
     "KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "v4l2loopback.ko"
   ];
 
   meta = {