openrazer: Fix build with Linux 5.4

Changed files
+1 -1
pkgs
os-specific
linux
openrazer
+1 -1
pkgs/os-specific/linux/openrazer/driver.nix
···
nativeBuildInputs = kernel.moduleBuildDependencies;
buildFlags = [
-
"KERNELDIR=${kernel.dev}/lib/modules/${kernel.version}/build"
+
"KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
];
installPhase = ''