Build Maxima with ECL or other pure Win32 alternative

Hi,

I am looking into compiling Maxima on Windows with as little reliance on
MinGW, Cygwin or other POSIX emulation.

I have tried following the instructions in INSTALL.lisp but had little
success.

I was wondering if anyone has had any success compiling Maxima using ECL on
Windows using the pure Lisp build system. If so, did they use 5.18.1 sources
or a CVS branch/HEAD?

If there are known difficulties, are there any recommended Lisp
implementations that can be used to build Maxima in the manner described on
Windows? It would be advantageous not to lose a lot on performance.

Thanks
Blair