anchor.diff: -{ stdenv, buildPackages, fetchFromGitHub, perl, buildLinux, ... } @ args:
  +{ stdenv, lib, buildPackages, fetchFromGitHub, perl, buildLinux, ... } @ args:
   
   let
     modDirVersion = "4.14.62";
     tag = "1.20180817";
   in
  -stdenv.lib.overrideDerivation (buildLinux (args // rec {
  +lib.overrideDerivation (buildLinux (args // rec {
     version = "${modDirVersion}-${tag}";
     inherit modDirVersion;
   
  
positive.code: 
    # Make copies of the DTBs named after the upstream names so that U-Boot finds them.
    # This is ugly as heck, but I don't know a better solution so far.
    postFixup = if stdenv.hostPlatform.system == "aarch64-linux" then ''
      rm $out/dtbs/broadcom/bcm283*.dtb
      copyDTB() {
        cp -v "$out/dtbs/broadcom/$1" "$out/dtbs/broadcom/$2"
      }
  
      copyDTB bcm2710-rpi-3-b.dtb bcm2837-rpi-3-b.dtb
      copyDTB bcm2710-rpi-3-b-plus.dtb bcm2837-rpi-3-b-plus.dtb
    '' else ''
      rm $out/dtbs/bcm283*.dtb
      copyDTB() {
        cp -v "$out/dtbs/$1" "$out/dtbs/$2"
      }
  
      copyDTB bcm2708-rpi-0-w.dtb bcm2835-rpi-zero.dtb
      copyDTB bcm2708-rpi-0-w.dtb bcm2835-rpi-zero-w.dtb
      copyDTB bcm2708-rpi-b.dtb bcm2835-rpi-a.dtb
  
negative.code:     copyDTB bcm2708-rpi-b-plus.dtb bcm2835-rpi-b-plus.dtb
      copyDTB bcm2708-rpi-b-plus.dtb bcm2835-rpi-zero.dtb
      copyDTB bcm2708-rpi-cm.dtb bcm2835-rpi-cm.dtb
    '' + lib.optionalString (lib.elem stdenv.hostPlatform.system ["armv7l-linux"]) ''
      copyDTB bcm2709-rpi-2-b.dtb bcm2836-rpi-2-b.dtb
    '' + lib.optionalString (lib.elem stdenv.hostPlatform.system ["armv7l-linux" "aarch64-linux"]) ''
      copyDTB bcm2710-rpi-3-b.dtb bcm2837-rpi-3-b.dtb
      copyDTB bcm2710-rpi-3-b-plus.dtb bcm2837-rpi-3-b-plus.dtb
      copyDTB bcm2710-rpi-cm3.dtb bcm2837-rpi-cm3.dtb
  