QML Permission API not working with build from source

Examples that use the QML Permission API, e.g.

{{ LocationPermission {}}
    id: permission
    accuracy: LocationPermission.Precise
    availability: LocationPermission.WhenInUse
}
{{}}

don't work when using a local Qt build. Using the prebuild libraries works well.

The feature QT_FEATURE_permissions is turned on and the C++ API tests tst_qpermission runs without failure.

However, the QML type is not registered.

/build/qtbase/qml/QtCore/plugins.qmltypes has all Components (e.g. qqmlsettings_p.h) except for qqmlpermissions_p.h.