I had had Preview 3 with the old installer, and things (rustc, gyp, &c.) tended to work with just advising them about 15.0 in a similar fashion to how they used 14.0.<p>Alas, the new installer changes the techniques used to find things (there was an InstallDir registry key somewhere or other which is no more), so now for running things like rustc and gyp I need to either run vcvarsall.bat manually (rustc) or make invasive changes (gyp) before they’ll work.<p>In short: if you want to use this to actually <i>develop</i> things that aren’t purely Visual Studio projects, you’ll find it more convenient to wait.