Wrapping waybar to use specific icons

I have been trying to wrap waybar to use specific icons. No matter what I do waybar will not use them, here is the current approach: packages.waybar = lib.makeOverridable ({ font ? { package = pkgs.nerd-fonts._0xproto; family = "0xProto Nerd Font"; }, icons ? { package = pkgs.papirus-icon-theme; theme = "Papirus"; }, features ? [ "audio" "backlight" "system-info" "battery" "tray" ], ...