monolith: fix bluetooth dongle

pkgs/default.nix

@@ -8,4 +8,5 @@ rec {
   emmet-cli = pkgs.callPackage ./emmet-cli.nix { };
   material-wifi-icons = pkgs.callPackage ./material-wifi-icons.nix { };
   gnome-pass-search-provider = pkgs.callPackage ./gnome-pass-search-provider.nix { };
+  linux-bluetooth = pkgs.callPackage ./linux-bluetooth.nix { };
 }

pkgs/linux-bluetooth.nix

@@ -0,0 +1,47 @@
+{
+  pkgs,
+  lib,
+  kernel ? pkgs.linuxPackages_latest.kernel,
+  patches ? [ ],
+}:
+
+pkgs.stdenv.mkDerivation {
+  pname = "bluetooth-kernel-module";
+  inherit (kernel)
+    src
+    version
+    postPatch
+    nativeBuildInputs
+    ;
+
+  inherit patches;
+
+  kernel_dev = kernel.dev;
+  kernelVersion = kernel.modDirVersion;
+
+  modulePath = "drivers/bluetooth";
+
+  buildPhase = ''
+    BUILT_KERNEL=$kernel_dev/lib/modules/$kernelVersion/build
+
+    cp $BUILT_KERNEL/Module.symvers .
+    cp $BUILT_KERNEL/.config        .
+    cp $kernel_dev/vmlinux          .
+
+    make "-j$NIX_BUILD_CORES" modules_prepare
+    make "-j$NIX_BUILD_CORES" M=$modulePath modules
+  '';
+
+  installPhase = ''
+    make \
+      INSTALL_MOD_PATH="$out" \
+      XZ="xz -T$NIX_BUILD_CORES" \
+      M="$modulePath" \
+      modules_install
+  '';
+
+  meta = {
+    description = "Bluetooth kernel module";
+    license = lib.licenses.gpl3;
+  };
+}