Upgrading to NixOS 25.11

This command shows what channel you are currently on.

sudo nix-channel --list

This command will change your system channel to 25.11.

sudo nix-channel --add https://channels.nixos.org/nixos-25.11 nixos

The last command you will need to run will be. This command will perform the upgrade itself.

sudo nixos-rebuild switch --upgrade

To upgrade all packages installed via Flatpak.

sudo flatpak update -y

To run everything at once.

sudo nix-channel --add https://channels.nixos.org/nixos-25.11 nixos && sudo nixos-rebuild switch --upgrade && sudo flatpak update -y