Building the Examples.. ofConstants.h not found

I have already built the Project Generator and downloaded the external dependencies.
In the OF/ root, I ran:
➜ projectGenerator -r -o"." examples

This takes roughly 1.5 seconds. Is this suspiciously quick?
When I run make in any example directory, I get the following error:

/openFrameworks/./libs/openFrameworks/ofMain.h:6:10: fatal error: ofConstants.h: No such file or directory
** 6 | #include “ofConstants.h”**
** | ^~~~~~~~~~~~~~~compilation terminated.**

I suppose all the other header files in ofMain.h will not be found either. I could try to hardcode all the includes, but this would just be a kludge.
I must be missing something, anybody got any ideas?