log.Fatal(err)
	}
	if len(seen) == 0 {
		log.Fatalf("did not find any files to add")
	}
	if !seen["US/Eastern"] {
		log.Fatalf("did not find US/Eastern to add")
	}
	if err := os.WriteFile(args[0], zb.Bytes(), 0666); err != nil {
		log.Fatal(err)
	}

				Name:     "a/b",
				Content:  []byte{},
				Mode:     0666,
				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
			},
			{
				Name:     "a/b/",
				Content:  []byte{},
				Mode:     fs.ModeDir | 0666,
				Modified: time.Date(2021, 12, 29, 0, 0, 0, 0, timeZone(0)),
			},
			{
				Name:     "a/b/c",
				Content:  []byte{},
				Mode:     0666,

			Typeflag: TypeSymlink,
		},
		fm: 0777 | fs.ModeSymlink,
	}, {
		// character device node.
		h: &Header{
			Name:     "dev/null",
			Mode:     0666,
			Size:     0,
			ModTime:  time.Unix(1360578951, 0),
			Typeflag: TypeChar,
		},
		fm: 0666 | fs.ModeDevice | fs.ModeCharDevice,
	}, {
		// block device node.
		h: &Header{
			Name:     "dev/sda",
			Mode:     0660,
			Size:     0,