anchor.diff:    inherit version;
     src = fetchurl {
       url = dmgUrl;
  -    sha256 = "0xqkl4yds0n9fdjvnk0v5mj382q02crry6wm2q7j3ncdqwsv02sv";
  +    sha256 = "0s8crlh8rvpanzk1w4z3hich0a3mw0m5xhpcg07bxy02calhpdk1";
       curlOpts = "-r ${dmgRange}";
     };
   
  
positive.code: 
  let
  
    version = "1.43_4";
  
  
    # Updated according to https://github.com/patjak/bcwc_pcie/pull/81/files
  
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
  