anchor.diff:  with lib;
   
   let
  -  rootfsImage = import ../../../lib/make-ext4-fs.nix {
  -    inherit pkgs;
  +  rootfsImage = pkgs.callPackage ../../../lib/make-ext4-fs.nix ({
       inherit (config.sdImage) storePaths;
       volumeLabel = "NIXOS_SD";
     } // optionalAttrs (config.sdImage.rootPartitionUUID != null) {
       uuid = config.sdImage.rootPartitionUUID;
  -  };
  +  });
   in
   {
     options.sdImage = {
  
positive.code:         (cd boot; mcopy -bpsvm -i ../bootpart.img ./* ::)
          dd conv=notrunc if=bootpart.img of=$img seek=$START count=$SECTORS
        '';
      };
  
      boot.postBootCommands = ''
        # On the first boot do some maintenance tasks
  
negative.code: 
      sdImage.storePaths = [ config.system.build.toplevel ];
  
      system.build.sdImage = pkgs.callPackage ({ stdenv, dosfstools, e2fsprogs, mtools, libfaketime, utillinux }: stdenv.mkDerivation {
        name = config.sdImage.imageName;
  
        nativeBuildInputs = [ dosfstools e2fsprogs mtools libfaketime utillinux ];
  
        buildCommand = ''
          mkdir -p $out/nix-support $out/sd-image
  