anchor.diff:  
   stdenv.mkDerivation rec {
     name = "firmware-linux-nonfree-${version}";
  -  version = "2016-05-18";
  +  version = "2016-07-12";
   
     # This repo is built by merging the latest versions of
     # http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/
  
positive.code:   src = fetchFromGitHub {
      owner = "wkennington";
      repo = "linux-firmware";
      rev = "19495832c6899bd811874439376d513290773c31";
      sha256 = "1700a24sfw6xa3q3r8aa5wfhydgix83m57plpfirdmc9qr4isrr0";
    };
  
    preInstall = ''
  
negative.code:     homepage = http://packages.debian.org/sid/firmware-linux-nonfree;
      license = licenses.unfreeRedistributableFirmware;
      platforms = platforms.linux;
      maintainers = with maintainers; [ wkennington fpletz ];
      priority = 6; # give precedence to kernel firmware
    };
  
  