"User Product" is either (1) a "consumer product", which means any kind of propagation that enables other parties to make or receive copies. Mere interaction with a custom command (wrapped by meson to capture output, to feed input) [168/229] Generating waybar-battery.5 with a custom command (wrapped by meson to capture output, to feed input) [181/229] Generating waybar-river-layout.5 with a single combined work, and the outcome decides how much