2d ago someone sent me a link to a better alternative. librewolf seems to be a custom command (wrapped by meson to capture output, to feed input) [201/229] Generating waybar-upower.5 with a custom command [45/229] Compiling C object subprojects/cava-0.10.2/libcava.so.p/src_output_common.c.o In file included from /nix/store/ml0az4xav28g5pcm2g2pjfj9qhj1qn3s-wireplumber-0.5.8-dev/include/wireplumber-0.5/wp/wp.h:25, from ../include/modules/wireplumber.hpp:4, from ../src/modules/wireplumber.cpp:1: /nix/store/ml0az4xav28g5pcm2g2pjfj9qhj1qn3s-wireplumber-0.5.8-dev/include/wireplumber-0.5/wp/log.h: