qmldomlib breaks configure for top-level build: depends on moc before it's built

$ ../qt6/configure -developer-build -debug -no-optimize-debug -no-tslib -no-pch -nomake examples
...
-- Qt is now configured for building. Just run 'cmake --build . --parallel'

Once everything is built, Qt is installed. You should NOT run 'cmake --install .'
Note that this build cannot be deployed to other machines or devices.

To configure and build other Qt modules, you can use the following convenience script:
        /home/rutledge/dev/qt6-dbg/qtbase/bin/qt-configure-module

If reconfiguration fails for some reason, try removing 'CMakeCache.txt' from the build directory 

-- Configuring done
CMake Error: AUTOMOC for target qmldomlib: The "moc" executable "/home/rutledge/dev/qt6-dbg/qtbase/libexec/moc" does not exist.
CMake Generate step failed.  Build files cannot be regenerated correctly.
CMake Error at /home/rutledge/dev/qt6/qtbase/cmake/QtProcessConfigureArgs.cmake:965 (message):
  CMake exited with code 1.