• This issue is blocking
• This issue is causing unreasonable pain

A part of the runtime issues discussed at length at dotnet/runtime#42397 is the fact that the sdk.txt mechanism doesn't play well with non-ASCII characters. We should specify encoding and make sure the .dotnet path gets through in cases like this:

> mv runtime runťime
> cd runťime
> ./dotnet.cmd
C:\Source\runťime\.dotnet
The system cannot find the path specified.