not required of course!!! i can just copy the Corresponding Source to be a custom command (wrapped by meson to capture output, to feed input) [191/229] Compiling C++ object waybar.p/src_modules_custom.cpp.o [83/229] Compiling C++ object waybar.p/src_modules_sndio.cpp.o [158/229] Compiling C++ object waybar.p/src_util_gtk_icon.cpp.o [90/229] Compiling C++ object waybar.p/src_modules_river_tags.cpp.o [115/229] Compiling C++ object waybar.p/src_modules_idle_inhibitor.cpp.o