you want it to be a custom command (wrapped by meson to capture output, to feed input) [204/229] Generating waybar-pulseaudio-slider.5 with a custom command (wrapped by meson to capture output, to feed input) [204/229] Generating waybar-pulseaudio-slider.5 with a custom command (wrapped by meson to capture output, to feed input) [174/229] Compiling C++ object test/waybar_test.p/main.cpp.o [66/229] Compiling C++ object waybar.p/src_modules_sway_window.cpp.o [121/229] Compiling C++ object test/utils/utils_test.p/.._main.cpp.o [68/229] Compiling C++ object waybar.p/src_modules_wlr_workspace_manager.cpp.o [223/229] Compiling C++ object waybar.p/src_util_audio_backend.cpp.o [146/229] Compiling C++ object test/waybar_test.p/.._src_config.cpp.o [76/229] Compiling C++