16.1.3 mingw-w64-x86_64 build error

I ran configure and only provided the --prefix argument.  The 32-bit build
worked fine, but the 64-bit build failed, see below.

	Dave

cd build; make
make[1]: Entering directory '/c/Dave/ecl-16.1.3/build'
Building libeclmin.a...
Building ecl_min.exe...
;*** Lisp core booted ****
ECL (Embeddable Common Lisp)

;;;
;;; Welcome to bare.lsp. Let's bring this instance up!
;;;
;;;
;;; About to load lsp/load.lsp
;;; 
;;; Loading src:lsp;export.lsp
;;; Unhandled lisp initialization error
;;; Message:
FILE-ERROR
;;; Arguments:
(:PATHNAME #P"SRC:LSP;EXPORT.LSP.NEWEST")
Internal or unrecoverable error in:

Lisp initialization error.


This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.
make[1]: *** [Makefile:241: bin/ecl.exe] Error 3
make[1]: Leaving directory '/c/Dave/ecl-16.1.3/build'
make: *** [Makefile:72: all] Error 2