[Issue 14849] Visual Studio 2015 not detected during installation

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14849

--- Comment #13 from Rainer Schuetze <r.sagitario at gmx.de> ---
>UCRTVersion=10.0.10150.0
>UMVersion=10.0.10075.0
>[...]
>LIB=%LIB%;"%UniversalCRTSdkDir%\Lib\%UMVersion%\um\x86"
>LIB=%LIB%;"%UniversalCRTSdkDir%\Lib\%UCRTVersion%\ucrt\x86"

I don't see UMVersion being set by vcvarsall.bat. The installer just mimicks
what is done by this batch.

Is UMVersion set by installing the Windows 10 SDK? (I have only 8.1 installed).

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