INSTALLATION

• sudo -i
• printf "label: gpt\n,550M,U\n,,L\n" | sfdisk /dev/sdX
• nix-shell -p btrfs-progs
• mkfs.fat -F 32 /dev/sdX1
• mkfs.btrfs /dev/sdX2
• mkdir -p /mnt
• mount /dev/sdX2 /mnt
• btrfs subvolume create /mnt/root
• btrfs subvolume create /mnt/home
• btrfs subvolume create /mnt/nix
• btrfs subvolume create /mnt/swap
• umount /mnt
• mount -o compress=zstd,subvol=root /dev/sdX2 /mnt
• mkdir /mnt/{home,nix,swap}
• mount -o compress=zstd,subvol=home /dev/sdX2 /mnt/home
• mount -o compress=zstd,noatime,subvol=nix /dev/sdX2 /mnt/nix
• mount -o subvol=swap /dev/sdXY /mnt/swap
• btrfs filesystem mkswapfile --size 8g --uuid clear /mnt/swap/swapfile
• mkdir /mnt/boot
• mount /dev/sdX1 /mnt/boot
• nixos-generate-config --root /mnt
• nix-shell -p git
• git clone https://github.com/christop23/nixconfig.git /mnt/etc/nixos/dots
• rm /mnt/etc/nixos/configuration.nix
• cp /mnt/etc/nixos/dots/configuration.nix /mnt/etc/nixos/
• rm -r /mnt/etc/nixos/dots

COMPRESSION AND SWAP

nixos-generate-config --show-hardware-config doesn't detect mount options automatically, so to enable compression, you must specify it and other mount options in a persistent configuration:

fileSystems = {
"/".options = [ "compress=zstd" ];
"/home".options = [ "compress=zstd" ];
"/nix".options = [ "compress=zstd" "noatime" ];
"/swap".options = [ "noatime" ];
};

Finally, add the swap file to your configuration and nixos-rebuild switch:

swapDevices = [ { device = "/swap/swapfile"; } ];

For more idea on this, have a look at the hardware-configuration.nix file

• nixos-install
• reboot

POST INSTALLATION STEPS

Login as root and do:

• passwd username (replace 'username' with your user name)
• reboot

Login as user and do:

• nix-shell -p git
• git clone https://github.com/christop23/nixconfig.git ~/.dotfiles
• cd ~/.dotfiles
• rm hardware-configuration.nix (copy your new config from /etc/nixos/)
• sudo nixos-rebuild switch --flake .#
• reboot

Login as user and do:

• rm ~/.bash_history