> +      (license license:x11))))

The license does not have the

  Except as contained in this notice, the name of the X Consortium
  shall not be used in advertising or otherwise to promote the sale,
  use or other dealings in this Software without prior written
  authorization from the X Consortium.

  X Window System is a trademark of X Consortium, Inc.

clause, so this seems to be the license:expat?  Looks like the first
line in LICENSE is incorrect.

Greetings,
Maxime.