Stephen, I was trying to compiled the current MLton CVS under Cygwin, but I get an error: make -C runtime make[2]: Entering directory `/cygdrive/c/fulgham/projects/mlton/runtime' zcat gdtoa.tgz | tar xf - zcat: gdtoa.tgz: invalid compressed data--format violated patch -p0 <gdtoa-patch I've tried uncompressing with compress, gzip, pkzip with no luck. Any ideas? Thanks, -Brent