Error building Emacs 21.3.50 CVS using MSVC 6

[Ben Key]

The error I am getting is as follows (see line marked ##ERROR##):

        d:\EMACS_CVS\_src\21.3.50\src\obj\i386\temacs.exe -batch -l loadup
dump
Loading loadup.el (source)...
Using load-path (../lisp)
Loading byte-run (source)...
Loading emacs-lisp/backquote (source)...
Loading subr (source)...
Loading version.el (source)...
Loading widget (source)...
Loading custom (source)...
Loading map-ynp (source)...
Loading env (source)...
Loading cus-start (source)...
Loading international/mule (source)...
Loading international/mule-conf.el (source)...
Loading format (source)...
Loading bindings (source)...
Loading files (source)...
Loading cus-face (source)...
Loading faces (source)...
(require cl) while preparing to dump (##ERROR##)
NMAKE : fatal error U1077:
'd:\EMACS_CVS\_src\21.3.50\src\obj\i386\temacs.exe' : return code
'0xffffffff'
Stop.

What can I do to fix this?