Hosts Directory#

This directory contains host-specific configurations for different machines.

Structure#

Each host has its own subdirectory with the following files:

• default.nix - Main configuration file for the host
• hardware-configuration.nix - Hardware-specific configuration (generated by nixos-generate-config)

Current Hosts#

• laptop - Dell Inspiron 3501

Adding a New Host#

1. Create a new directory under hosts/ with your hostname
2. Copy your hardware configuration:

   sudo nixos-generate-config --show-hardware-config > hosts/YOUR-HOST/hardware-configuration.nix
   

3. Create a default.nix using the template below
4. Add the host to flake.nix in the nixosConfigurations section

Template default.nix#

{ config, pkgs, ... }:

{
  imports = [
    ./hardware-configuration.nix
    ../../modules/desktop.nix      # Optional: Remove if not needed
    ../../modules/packages.nix
    ../../modules/services.nix
    ../../modules/gaming.nix       # Optional: Remove if not needed
  ];

  # Boot configuration
  boot = {
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    kernelPackages = pkgs.linuxPackages_latest;
  };

  # Networking
  networking = {
    hostName = "YOUR-HOSTNAME-HERE";
    networkmanager.enable = true;
  };

  # Timezone and locale
  time.timeZone = "Europe/London";
  i18n.defaultLocale = "en_GB.UTF-8";

  # Console configuration
  console = {
    font = "Lat2-Terminus16";
    keyMap = "uk";
  };

  # Sound
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
  };

  # User configuration
  users.users.YOUR-USERNAME = {
    isNormalUser = true;
    description = "YOUR-DESCRIPTION";
    extraGroups = [ "networkmanager" "wheel" "audio" "video" ];
    shell = pkgs.zsh;
  };

  # Enable zsh system-wide
  programs.zsh.enable = true;

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # Enable flakes
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # System version
  system.stateVersion = "25.11";
}

Adding to flake.nix#

Add your new host to the nixosConfigurations section:

YOUR-HOSTNAME = nixpkgs.lib.nixosSystem {
  system = "x86_64-linux";
  modules = [
    ./hosts/YOUR-HOSTNAME
    
    home-manager.nixosModules.home-manager
    {
      home-manager.useGlobalPkgs = true;
      home-manager.useUserPackages = true;
      home-manager.users.YOUR-USERNAME = import ./home/home.nix;
    }
  ];
};

Building a Specific Host#

To build and switch to a specific host configuration:

sudo nixos-rebuild switch --flake .#YOUR-HOSTNAME

For the laptop:

sudo nixos-rebuild switch --flake .#laptop