From 8d715c1f78a0e4797171418ca27b800b0f268afa Mon Sep 17 00:00:00 2001
From: Nick Cao <nickcao@nichi.co>
Date: Thu, 10 Feb 2022 09:40:50 +0800
Subject: [PATCH] batman_adv: prepend kernel.makeFlags to makeFLags

---
 pkgs/os-specific/linux/batman-adv/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/batman-adv/default.nix b/pkgs/os-specific/linux/batman-adv/default.nix
index 354f4b1bff2c..123c42e83971 100644
--- a/pkgs/os-specific/linux/batman-adv/default.nix
+++ b/pkgs/os-specific/linux/batman-adv/default.nix
@@ -12,11 +12,13 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = kernel.moduleBuildDependencies;
+  makeFlags = kernel.makeFlags ++ [
+    "KERNELPATH=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+  ];
 
   hardeningDisable = [ "pic" ];
 
   preBuild = ''
-    makeFlags="KERNELPATH=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
     sed -i -e "s,INSTALL_MOD_DIR=,INSTALL_MOD_PATH=$out INSTALL_MOD_DIR=," \
       -e /depmod/d Makefile
   '';