From 42e1c1b445be6e00012e5cd8a2b9d614cd7930cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adomas=20Jatu=C5=BEis?= <adomixaszvers@gmail.com>
Date: Wed, 21 Oct 2026 12:20:14 +0300
Subject: [PATCH] linuxPackages.bbswitch: install module through
 modules_install

---
 pkgs/os-specific/linux/bbswitch/default.nix | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/pkgs/os-specific/linux/bbswitch/default.nix b/pkgs/os-specific/linux/bbswitch/default.nix
index 6d55fe64d23b..7e5828101ef8 100644
--- a/pkgs/os-specific/linux/bbswitch/default.nix
+++ b/pkgs/os-specific/linux/bbswitch/default.nix
@@ -34,15 +34,17 @@ stdenv.mkDerivation (finalAttrs: {
 
   preBuild = ''
     substituteInPlace Makefile \
-      --replace "/lib/modules" "${kernel.dev}/lib/modules"
+      --replace-fail "/lib/modules" "${kernel.dev}/lib/modules"
   '';
 
-  makeFlags = kernelModuleMakeFlags;
-
-  installPhase = ''
-    mkdir -p $out/lib/modules/${kernel.modDirVersion}/misc
-    cp bbswitch.ko $out/lib/modules/${kernel.modDirVersion}/misc
+  makeFlags = kernelModuleMakeFlags ++ [
+    "INSTALL_MOD_PATH=${placeholder "out"}"
+    "INSTALL_MOD_DIR=kernel/misc"
+    "INSTALL_MOD_STRIP=1"
+    "DEPMOD=true"
+  ];
 
+  postInstall = ''
     mkdir -p $out/bin
     tee $out/bin/discrete_vga_poweroff << EOF
     #!${runtimeShell}
@@ -57,6 +59,13 @@ stdenv.mkDerivation (finalAttrs: {
     chmod +x $out/bin/discrete_vga_poweroff $out/bin/discrete_vga_poweron
   '';
 
+  installFlags = [
+    "-C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "M=$(PWD)"
+  ];
+
+  installTargets = [ "modules_install" ];
+
   meta = {
     description = "Module for powering off hybrid GPUs";
     platforms = [