anchor.diff:  
     preBuild = ''
       makeFlagsArray+=("PREFIX=$out")
  +  '' + /* Build libXNVCtrl */ ''
  +    make -C src/ $makeFlags build-xnvctrl
     '';
   
     makeFlags = [
  
positive.code:     install -D -m644 -v 'doc/nvidia-settings.png' \
        "$out/share/pixmaps/nvidia-settings.png"
    '' + /* Install libXNVCtrl */ ''
      #install -D -m644 -v 'src/libXNVCtrl/libXNVCtrl.so' \
      #  "$out/lib/libXNVCtrl.so"
    '';
  
    preFixup = ''
  
negative.code:     "NV_USE_BUNDLED_LIBJANSSON=0"
      "NVML_AVAILABLE=1"
    ];
  
    postInstall = /* NVIDIA Settings .desktop entry */ ''
      install -D -m644 -v 'doc/nvidia-settings.desktop' \
  