Package update error RSQLite.h:9:10: fatal error: Rcpp.h: No such file or directory #include <Rcpp.h>

Two package updates (RSQLite and V8) failed today with the same error output:
XXXXXX: fatal error: Rcpp.h: No such file or directory
#include <Rcpp.h>

I reinstalled Rcpp with no problems, but that didn't fix either of the two updates. Rcpp.h is located where it's supposed to be in the Rcpp package directory in my user library. Any suggestions as to how to fix this?

Running R 4.0.5, RStudio Version 1.4.1103, on a Windows 10 (uptodate) 64 bit virtual desktop
Larry Hunsicker

Yes, it's very common for Rccp related packages not to compile on Windows, you better wait for the precompiled binary to become available, this is not going to take long, a couple days usually.