anchor.diff:        name = "firmware-nonfree";
         owner = "RPi-Distro";
         repo = "firmware-nonfree";
  -      rev = "00de3194a96397c913786945ac0af1fd6fbec45b";
  -      sha256 = "1xnr364dkiq6gmr21lcrj23hwc0g9y5qad8dm2maij647bgzp07r";
  +      rev = "54ffdd6e2ea6055d46656b78e148fe7def3ec9d8";
  +      sha256 = "4WTrs/tUyOugufRrrh0qsEmhPclQD64ypYysxsnOyS8=";
       })
     ];
   
  
positive.code:     mkdir -p "$out/lib/firmware/brcm"
  
      # Wifi firmware
      for filename in firmware-nonfree/brcm/brcmfmac434??-sdio.*; do
        cp "$filename" "$out/lib/firmware/brcm"
      done
  
  
negative.code: 
    outputHashMode = "recursive";
    outputHashAlgo = "sha256";
    outputHash = "l+7VOq7CV5QA8/FWjMBGDcxq8Qe7NFf6E2Y42htZEgE=";
  
    meta = with lib; {
      description = "Firmware for builtin Wifi/Bluetooth devices in the Raspberry Pi 3+ and Zero W";
  