It's used at build time in 215 crates (of which 2 optionally, 12 directly).

Depender (with downloads and own rev deps) qt_ritual_build version
480 15 qt_core build ^0.5.0
470 14 qt_gui build ^0.5.0
120 4 qt_widgets build ^0.5.0
qt_qml build ^0.5.0
1 qt_3d_logic build ^0.5.0
1 qt_3d_render build ^0.5.0
1 qt_3d_input build ^0.5.0
qt_charts build ^0.5.0
qt_3d_extras build ^0.5.0
qt_ui_tools build ^0.5.0
1 qt_core_custom_events build ^0.5.0-alpha.1
4 qt_3d_core build ^0.5.0