How to compile for Windows?

[chrisant996]

I have installed Go 1.17.
I have MinGW installed.

When I run mingw32-make the fzf build fails with the following:

process_begin: CreateProcess(NULL, dirname c:/repos/fzf/Makefile, ...) failed.
mingw32-make: Makefile:6: pipe: No such file or directory
The system cannot find the path specified.
Makefile:15: *** Not on git repository; cannot determine $FZF_VERSION.  Stop.

The BUILD.md file says only make, and only prereq is Go 1.17.

But it seems like only Windows there must be additional steps needed, and I'm not sure yet what I'm missing.
It is in a git repo, so the "Not on git repository" error is a side effect of something further upstream.
Failing to run dirname suggests that there is some toolset missing, but since others have gotten this working, it would be great to find out how.

I'm happy to make a PR to update the BUILD.md file with steps for Windows once I've gotten that working.

Any help is appreciated.