Testing issues related to changes made in phobos locally

[Nick Treleaven]

On Monday, 24 March 2025 at 13:43:26 UTC, Akshat Sharma wrote:
> $ make -j16 -f posix.mak unittest
> posix.mak:1: ===== DEPRECATION NOTICE =====
> posix.mak:2: ===== DEPRECATION: posix.mak is deprecated. Please 
> use generic Makefile instead.
> posix.mak:3: ==============================
> C:/Dev-Cpp/bin/make.exe -f Makefile unittest
> Makefile:142: Extraneous text after `else' directive
>
> Makefile:146: *** only one `else' per conditional.  Stop.

See the file header:
```sh
# This makefile is designed to be run by gnu make.
# - Windows: you may download a prebuilt zipped .exe from 
https://github.com/dlang/dmd/releases/download/nightly/gnumake-4.4-win64.zip.
#   You also need a Git for Windows installation, for bash and 
common GNU tools like cp,mkdir,mv,rm,touch,which.
```
The Wiki instructions should probably mention that.