Hmake needs Posix, which isn't supported on Windows, sorry.
The first part of this statement isn't strictly-speaking true. The batch part of hmake does not require Posix. The interactive interface (hi) may require Posix, but only if you build it with GHC and only if the readline library is available. If you don't want to use hi, or if you don't care about using readline's editing facilities inside hi, then you could simply disregard the errors. [ Really I should provide a configure option to disable readline. Until then, you can hack the file lib/$(MACHINE)/config. Just change the line READLINE="-DUSE_READLINE=1 -lreadline" to READLINE="" and the build should go smoothly again. (Provided you don't issue another ./configure command) ] Regards, Malcolm