The Gwydion Dylan 2.2 binary distribution for FreeBSD can be installed by
using the pkg_add command, e.g.,

	# pkg_add dylan-2.2.0.tgz

The d2c-2.2.0-FreeBSD.gz file is a compressed version of the d2c
compiler executable.  Downloading this file alone is sufficient if you
want to build the distribution from source; uncompress it, rename it as 'd2c'
and put it in your path.