On 22 August, pkgsrc was updated to not use the buildlink-x11 package.
In fact, it's use is currently marked experimental and untested in the
pkgsrc documentation.  If it's installed on your system, then please
pkg_delete it!  Otherwise, it will cause compile-time errors on your
system.

This is needed only if you are tracking the current pkgsrc, and doesn't
affect users of the 1.5.x-tagged pkgsrc.

	Thanks,

	-- Johnny Lam <jlam@jgrind.org>