anchor.diff:    src = fetchFromGitHub {
       owner = "wkennington";
       repo = "linux-firmware";
  -    rev = "19495832c6899bd811874439376d513290773c31";
  -    sha256 = "1700a24sfw6xa3q3r8aa5wfhydgix83m57plpfirdmc9qr4isrr0";
  +    rev = "cccb6a0da98372bd66787710249727ad6b0aaf72";
  +    sha256 = "1c7h8i37nbyy37zqhybxd3y6aqabfv4nrdkjg789w67mdnn6hka0";
     };
   
     preInstall = ''
  
positive.code: 
  stdenv.mkDerivation rec {
    name = "firmware-linux-nonfree-${version}";
    version = "2016-05-18";
  
    # This repo is built by merging the latest versions of
    # http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/
  
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
    };
  
  