wget https://github.com/sbopkg/sbopkg/releases/download/0.38.3/sbopkg-0.38.3-noarch-1_wsr.tgz
installpkg sbopkg-0.38.3-noarch-1_wsr.tgz
sqg -p flatpak
sbopkg -i flatpak
flatpak remote-add --user flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak install com.valvesoftware.Steam


You forgot
nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "steam" "steam-original" "steam-unwrapped" "steam-run" ];I’m not using unfreePredicate so I didn’t think that was necessary.
https://nixos.wiki/wiki/Steam
Maybe I should try it anyway. Games start but even the menus are so slow that I never get to actual play.
You can also use this lil guy, but by default you can’t install unfree software (not sure if that is different if you use flakes):
nixpkgs.config.allowUnfree = true;