Declt requires ASDF 3 and SBCL 2.3.1 or later. Other Lisp
implementations are not currently supported, but may be in the future.
Besides, SBCL needs to be compiled with support for
:sb-xref-for-internals. This can be achieved by passing the
--with-sb-xref-for-internals option (or --fancy, which
includes it) to the make.sh build script.
The Texinfo code that Declt generates requires Makeinfo 6.7, and
contains extended Unicode characters (so even for reading Info, Unicode
support is necessary).
In order to compile and install the user manuals on your own, you will
need makeinfo / install-info, convert
(from Image Magick), dot, and graph-easy (from the
Graph::Easy Perl library).