anchor.diff:  
   let
   
  -  version = "1.43_4";
  +  version = "1.43_5";
   
   
     # Updated according to https://github.com/patjak/bcwc_pcie/pull/81/files
  
positive.code: 
    meta = with stdenv.lib; {
      description = "facetimehd firmware";
      homepage = https://support.apple.com/downloads/DL1877;
      license = licenses.unfree;
      maintainers = with maintainers; [ womfoo grahamc ];
      platforms = [ "i686-linux" "x86_64-linux" ];
  
negative.code:   # and https://github.com/patjak/bcwc_pcie/blob/5a7083bd98b38ef3bd223f7ee531d58f4fb0fe7c/firmware/extract-firmware.sh
  
    # From the Makefile:
    dmgUrl = "https://updates.cdn-apple.com/2019/cert/041-88431-20191011-e7ee7d98-2878-4cd9-bc0a-d98b3a1e24b1/OSXUpd10.11.5.dmg";
    dmgRange = "204909802-207733123"; # the whole download is 1.3GB, this cuts it down to 2MB
    # Notes:
    # 1. Be sure to update the sha256 below in the fetch_url
    # 2. Be sure to update the homepage in the meta
  