Probably the SDK update is the relevant one. The error is xform confused by the placement of a #pragma, and probably a new one was introduced in “winnt.h”. I’ll have to look more.

I’ve patched xform to accommodate the new header.

One day, probably, we’ll get tired of trying to maintain xform and change the Windows build for Racket CS to just bootstrap via CGC instead of 3m.

Or maybe by then, WSL will be so pervasive that the Windows build can use the scripts that work everywhere else AND don’t require a BC build to produce a CS build.