CMake: examples with qt6_qml_type_registration in them fail to configure with non-installed developer build

When attempting to build qtdeclarative examples that have qt6_qml_type_registration in them (e.g. many of the examples under examples/quick/scenegraph), I get the following from qt-cmake-private .

I am using a developer build. (qtbase was configured with cmake -GNinja -DFEATURE_developer_build=ON -DBUILD_EXAMPLES=OFF -DBUILD_TESTING=OFF . )

Make Error at C:/work/qtbase_cmake/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:584 (message):
  Please specify an install directory using INSTALL_DIR
Call Stack (most recent call first):
  C:/work/qtbase_cmake/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:480 (qt6_generate_meta_types_json_file)
  CMakeLists.txt:62 (qt6_qml_type_registration)