OS: Windows 8.1 (64-bit)
Vagrant version: 1.9.7, Windows 64-bit (latest)
I am attempting to install Mediawiki-Vagrant but (in addition to the problem described at T152801) the setup script had the wrong path to the embedded Ruby executable. On my setup it is %vagrant%\..\..\embedded\mingw64\bin\ruby.exe instead of %vagrant%\..\..\embedded\bin\ruby.exe. After I made this change in setup.bat, it appears to run fine.