anchor.diff:  # See libv4l in all-packages.nix for the libs only (overrides alsa, libX11 & QT)
   
   stdenv.mkDerivation rec {
  -  name = "v4l-utils-1.12.5";
  +  name = "v4l-utils-1.12.6";
   
     src = fetchurl {
       url = "https://linuxtv.org/downloads/v4l-utils/${name}.tar.bz2";
  -    multihash = "QmPN2qMtk72HxzEN7kPzWoEUdYrZQuY4WeGaCcFQNJUNXL";
  -    sha256 = "0618162ddb0b57fe7c45407d4d66ed79e3a134cdbc9e72598d34e61d3359e20d";
  +    multihash = "QmVfyxtJPBRu5yPod7sdrs7ALpTx8GsGnmJTb8uFLkHkL2";
  +    sha256 = "74da1040284eaba48277ad051ffe1fca0ee05c5591bb01179d928def6d0a4561";
     };
   
     nativeBuildInputs = [
  
positive.code: , perl
  
  , alsa-lib
  , libjpeg-turbo_1-4
  , libx11
  , qt5
  
  
negative.code:     libx11
      qt5
    ] ++ [
      libjpeg-turbo
    ];
  
    postPatch = ''
  