anchor.diff:        offset=0
       ''}
   
  -    mkfs.${fsType} -F -L nixos -E offset=$offset $diskImage
  +    faketime -f "1970-01-01 00:00:01" mkfs.${fsType} -F -L nixos -E offset=$offset $diskImage
     
       root="$PWD/root"
       mkdir -p $root
  
positive.code:     ${channelSources}
    '';
  
    prepareImageInputs = with pkgs; [ rsync utillinux parted e2fsprogs lkl fakeroot config.system.build.nixos-prepare-root ] ++ stdenv.initialPath;
  
    # I'm preserving the line below because I'm going to search for it across nixpkgs to consolidate
    # image building logic. The comment right below this now appears in 4 different places in nixpkgs :)
  
negative.code:     fakeroot nixos-prepare-root $root ${channelSources} ${config.system.build.toplevel} closure
  
      echo "copying staging root to image..."
      # If we don't faketime, we can end up with timestamps other than 1 on the nix store, which
      # will confuse Nix in some situations (e.g., breaking image builds in the target image)
      # N.B: I use 0 here, which results in timestamp = 1 in the image. It's weird but see
      # https://github.com/lkl/linux/issues/393. Also, running under faketime makes `cptofs` super
      # noisy and it prints out that it can't find a bunch of files, and then works anyway. We'll
      # shut it up someday but trying to do a stderr filter through grep is running into some nasty
      # bug in some eval nonsense we have in runInLinuxVM and I'm sick of trying to fix it.
      faketime -f "1970-01-01 00:00:00" \
        cptofs ${pkgs.lib.optionalString partitioned "-P 1"} -t ${fsType} -i $diskImage $root/* /
    '';
  in pkgs.vmTools.runInLinuxVM (
    pkgs.runCommand name
  