Actual
    tar xf ../teensy-loader-cli_2.2.orig.tar.xz  --strip-components=1
and that version 2.2 tarball was fetched with `uscan`.

This effect:
  modified:   .gitignore
  modified:   Makefile
  modified:   README.md
  new file:   blink_slow.ino
  modified:   rebootor/usb.c
  modified:   teensy_loader_cli.c