try to get cedar module working

kernel/sunxi-cedar.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, kernel }:
+
+stdenv.mkDerivation rec {
+  pname = "sunxi-cedar";
+  version = "8bfe1150ea24537523465a77df56cd78076cda4a";
+
+  src = fetchFromGitHub {
+    owner = "uboborov";
+    repo = "sunxi-cedar-mainline";
+    rev = "${version}";
+    sha256 = "s/Cxr1GlmvORBvoJvU0LCpezacuQv5qT/9GyJYcAtq4=";
+  };
+
+  makeFlags = [
+    # For Makefile.linux
+    #"KDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    #"INSTALL_MOD_PATH=$(out)"
+    #"KERNELRELEASE=${kernel.modDirVersion}"
+
+    # For Makefile
+    "KERNEL_SOURCE=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+  ];
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  hardeningDisable = [ "pic" ];
+
+  meta = with lib; {
+    description = "sunxi cedar kernel module - device: /dev/cedar_dev - targeting mainline kernel - linux-4.11.y and higher ";
+    homepage = "https://github.com/uboborov/sunxi-cedar-mainline";
+    platforms = platforms.linux;
+    license = licenses.gpl2Plus;
+  };
+}