anchor.diff: -{ lib, mkDerivation, fetchFromGitLab, qmake, libusb1, hidapi, pkg-config }:
  +{ lib, mkDerivation, fetchFromGitLab, qmake, libusb1, hidapi, pkg-config, coreutils }:
   
   mkDerivation rec {
     pname = "openrgb";
  
positive.code:   buildInputs = [ libusb1 hidapi ];
  
    installPhase = ''
      mkdir -p $out/bin
      cp openrgb $out/bin
  
      mkdir -p $out/etc/udev/rules.d
      cp 60-openrgb.rules $out/etc/udev/rules.d
    '';
  
    doInstallCheck = true;
  
negative.code:     HOME=$TMPDIR $out/bin/openrgb --help > /dev/null
    '';
  
    meta = with lib; {
      description = "Open source RGB lighting control";
      homepage = "https://gitlab.com/CalcProgrammer1/OpenRGB";
      maintainers = with maintainers; [ jonringer ];
      license = licenses.gpl2Plus;
      platforms = platforms.linux;
    };
  }
  