anchor.diff:    buildParallel = false;
     installParallel = false;
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "V4L utils and libv4l, provide common image formats regardless of the v4l device";
       homepage = http://linuxtv.org/projects.php;
       license = licenses.lgpl21Plus;
  
positive.code: # See libv4l in all-packages.nix for the libs only (overrides alsa, libX11 & QT)
  
  stdenv.mkDerivation rec {
    name = "v4l-utils-1.12.6";
  
    src = fetchurl {
      url = "https://linuxtv.org/downloads/v4l-utils/${name}.tar.bz2";
      multihash = "QmVfyxtJPBRu5yPod7sdrs7ALpTx8GsGnmJTb8uFLkHkL2";
      sha256 = "74da1040284eaba48277ad051ffe1fca0ee05c5591bb01179d928def6d0a4561";
    };
  
    nativeBuildInputs = [
  
negative.code: # TODO: qt5 support
  
  let
    inherit (lib)
      any
      optionals
      optionalString;
  