anchor.diff:  
     src = runCommand "firmware-linux-nonfree-src-merged-${version}" {
       shallowSince = "2017-10-01";
  -    baseRev = "7f93c9deb484c0a8f4cf59780e77dc7b0c14abe3";
  +    baseRev = "65b1c68c63f974d72610db38dfae49861117cae2";
       iwlRev = "iwlwifi-fw-2017-11-15";
   
       # When updating this, you need to let it run with a wrong hash, in order to find out the desired hash
       # randomly mutate the hash to break out of fixed hash, when updating
  -    outputHash = "007ncka33vkyaxnih3a36w5pnhn19wdzjl95ig7lhznzvf1bnc1w";
  +    outputHash = "1anr7fblxfcrfrrgq98kzy64yrwygc2wdgi47skdmjxhi3wbrvxz";
   
       outputHashAlgo = "sha256";
       outputHashMode = "recursive";
  
positive.code: 
  stdenv.mkDerivation rec {
    name = "firmware-linux-nonfree-${version}";
    version = "2017-12-06-${src.iwlRev}";
  
    # The src runCommand automates the process of building a merged repository of both
    #
  
negative.code: 
    installFlags = [ "DESTDIR=$(out)" ];
  
    # Firmware blobs do not need fixing and should not be modified
    dontFixup = true;
  
    meta = with stdenv.lib; {
      description = "Binary firmware collection packaged by kernel.org";
      homepage = http://packages.debian.org/sid/firmware-linux-nonfree;
      license = licenses.unfreeRedistributableFirmware;
      platforms = platforms.linux;
      maintainers = with maintainers; [ fpletz ];
      priority = 6; # give precedence to kernel firmware
    };
  
  