Installation

• use the official installer image with Calamares to install NixOS as usual (feel free to add no desktop environment for a way faster build)
• make sure to name the user just like your main user on that system is going to be called (to not get UID conflicts with SOPS)
• reboot into the newly installed system
• add the following to /etc/nixos/configuration.nix:

  services.openssh.enable=true;
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  environment.systemPackages = with pkgs; [ git ];

• sudo nixos-rebuild switch
• login via ssh
• copy /etc/nixos/hardware-configuration.nix to your hosts hardware-configuration.nix in your flake, add, commit, push
• replace /etc/ssh/ssh_host_ed25519_key with your hosts' intended SSH key
• add ~/.ssh/id_ed25519, and run chmod 600 ~/.ssh/id_ed25519
• run nix develop github:charludo/nix#keyctl and use enable-user and sudo enable-host to set up the sops keys
• run sudo GIT_SSH_COMMAND='ssh -i /home/<username>/.ssh/id_ed25519 -o IdentitiesOnly=yes' nixos-rebuild switch --flake github:charludo/nix#<your_host> to install the system properly this time