How to unit-test a phobos module?

[Q. Schroll]

On Wednesday, 25 November 2020 at 21:16:15 UTC, Steven 
Schveighoffer wrote:
> I typically do:
>
> make -f posix.mak std/<module>.test
>
> -Steve

For some reason, [1] says `make.exe` would be installed by the 
DMD installer, but I found none. It explicitly says not to use 
GNU make. (I'm on Windows.)

[1] https://wiki.dlang.org/Building_under_Windows