anchor.diff:    nativeBuildInputs = [
       cmake
       ninja
  -    pkgconfig
  +    pkg-config
     ];
   
     cmakeFlags = [
  
positive.code: { stdenv, config, lib, fetchFromGitHub, cmake, libusb1, ninja, pkgconfig, gcc
  , cudaSupport ? config.cudaSupport or false, cudatoolkit
  , enablePython ? false, pythonPackages ? null }:
  
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "librealsense";
    version = "2.41.0";
  
    outputs = [ "out" "dev" ];
  
  