Pathing in the D ecosystem is generally broken (at least on windows)

[Kagamin via Digitalmars-d]

On Friday, 25 September 2015 at 00:25:54 UTC, Manu wrote:
> MSVC interaction (DMD-COFF and LDC) should probably leverage 
> Microsoft's command line scripts, which are located in reliable 
> places, and work reliably. MSCV associated tools shouldn't be 
> capable of finding optlink by mistake.

If you agree that to get dmd working one must run it in a 
specially prepared command prompt, that can work.