Kitty biscuits, a doggy delicacy for every k9.

In the steamOS provided by steam, it uses arch. It is a bit neutered in respect of handling native arch packages via pacman. This is so steam can maintain a bit of stability for users new to linux and are not ready for the arch experiance.

You can install almost anything you'll probably need as a flatpak and you can use the discover app store to find and install them.

For a more advanced use case you can also install nix and pacman applications. Probably better to stick with flatpak unless what you need isn't available.

Been thinking about trying to add the mullvad-vpn and mullvad-browser apps to my deck via nix. Some links I've been researching below.

https://blogs.igalia.com/berto/2024/06/05/more-ways-to-install-software-in-steamos-distrobox-and-nix/

https://wiki.nixos.org/wiki/Mullvad_VPN