Add minimal modular setup

.gitignore

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+# nixos-rebuild buildvm --flake .#
+result
+*.qcow2

flake.lock

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+{
+  "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1716457508,
+        "narHash": "sha256-ZxzffLuWRyuMrkVVq7wastNUqeO0HJL9xqfY1QsYaqo=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "850cb322046ef1a268449cf1ceda5fd24d930b05",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1716509168,
+        "narHash": "sha256-4zSIhSRRIoEBwjbPm3YiGtbd8HDWzFxJjw5DYSDy1n8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "bfb7a882678e518398ce9a31a881538679f6f092",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { nixpkgs, home-manager, ... }@inputs:
+    let
+      system = "x86_64-linux";
+
+      pkgs = import inputs.nixpkgs {
+        inherit system;
+      };
+
+      utils = import ./utils.nix { inherit pkgs inputs system; };
+    in with utils; {
+      nixosConfigurations = {
+        muon = mkHost ./hosts/muon/configuration.nix;
+      };
+
+      homeConfigurations = {
+        muon = mkHome ./hosts/muon/home.nix;
+      };
+    };
+}

hosts/muon/configuration.nix

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+{ config, lib, pkgs, ... }:
+let
+  cfg = config.mods;
+in {
+  # Hardware
+  imports = [
+    ./hardware-configuration.nix
+  ];
+
+  # System
+  mods.user.name = "muon";
+  networking.hostName = cfg.user.name;
+
+  # Modules
+  mods.desktop.enable = true;
+  services.xserver.windowManager.qtile.enable = true;
+
+  # Version of first install
+  system.stateVersion = "23.05";
+}

hosts/muon/hardware-configuration.nix

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+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/03e49688-cc62-49c9-a906-e2ea87a38891";
+      fsType = "ext4";
+    };
+
+  boot.initrd.luks.devices."luks-86769693-b61c-4712-852d-e0fba612d260".device = "/dev/disk/by-uuid/86769693-b61c-4712-852d-e0fba612d260";
+
+  fileSystems."/mnt/bulk" =
+    { device = "/dev/disk/by-uuid/11c2c896-d49a-4d9b-a846-b0a550128395";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/CCCC-449E";
+      fsType = "vfat";
+      options = [ "fmask=0022" "dmask=0022" ];
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.docker0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp0s31f6.useDHCP = lib.mkDefault true;
+  # networking.interfaces.tun0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.vboxnet0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hosts/muon/home.nix

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+{ config, pkgs, ... }:
+let
+  cfg = config.mods;
+in {
+  # Home Manager needs a bit of information about you and the paths it should
+  # manage.
+  home.username = cfg.user.name;
+  home.homeDirectory = "/home/${cfg.user.name}";
+
+  # This value determines the Home Manager release that your configuration is
+  # compatible with. This helps avoid breakage when a new Home Manager release
+  # introduces backwards incompatible changes.
+  #
+  # You should not change this value, even if you update Home Manager. If you do
+  # want to update the value, then make sure to first check the Home Manager
+  # release notes.
+  home.stateVersion = "23.05"; # Please read the comment before changing.
+
+  # The home.packages option allows you to install Nix packages into your
+  # environment.
+  home.packages = [
+    # # Adds the 'hello' command to your environment. It prints a friendly
+    # # "Hello, world!" when run.
+    # pkgs.hello
+
+    # # It is sometimes useful to fine-tune packages, for example, by applying
+    # # overrides. You can do that directly here, just don't forget the
+    # # parentheses. Maybe you want to install Nerd Fonts with a limited number of
+    # # fonts?
+    # (pkgs.nerdfonts.override { fonts = [ "FantasqueSansMono" ]; })
+
+    # # You can also create simple shell scripts directly inside your
+    # # configuration. For example, this adds a command 'my-hello' to your
+    # # environment:
+    # (pkgs.writeShellScriptBin "my-hello" ''
+    #   echo "Hello, ${config.home.username}!"
+    # '')
+  ];
+
+  # Home Manager is pretty good at managing dotfiles. The primary way to manage
+  # plain files is through 'home.file'.
+  home.file = {
+    # # Building this configuration will create a copy of 'dotfiles/screenrc' in
+    # # the Nix store. Activating the configuration will then make '~/.screenrc' a
+    # # symlink to the Nix store copy.
+    # ".screenrc".source = dotfiles/screenrc;
+
+    # # You can also set the file content immediately.
+    # ".gradle/gradle.properties".text = ''
+    #   org.gradle.console=verbose
+    #   org.gradle.daemon.idletimeout=3600000
+    # '';
+  };
+
+  # Home Manager can also manage your environment variables through
+  # 'home.sessionVariables'. These will be explicitly sourced when using a
+  # shell provided by Home Manager. If you don't want to manage your shell
+  # through Home Manager then you have to manually source 'hm-session-vars.sh'
+  # located at either
+  #
+  #  ~/.nix-profile/etc/profile.d/hm-session-vars.sh
+  #
+  # or
+  #
+  #  ~/.local/state/nix/profiles/profile/etc/profile.d/hm-session-vars.sh
+  #
+  # or
+  #
+  #  /etc/profiles/per-user/muon/etc/profile.d/hm-session-vars.sh
+  #
+  home.sessionVariables = {
+    # EDITOR = "emacs";
+  };
+
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+}

modules/nixos/core/boot.nix

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+{ pkgs, lib, ... }: {
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+}

modules/nixos/core/default.nix

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+{ pkgs, lib, ... }: {
+  imports = [
+    ./boot.nix
+    ./network.nix
+    ./user.nix
+  ];
+}

modules/nixos/core/network.nix

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+{ pkgs, lib, ... }: {
+  config = {
+    networking.networkmanager.enable = true;
+  };
+}

modules/nixos/core/user.nix

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+{ pkgs, lib, config, ... }: {
+  options = {
+    mods.user.name = lib.mkOption {
+      default = "muon";
+      description = "username of the main system user";
+    };
+  };
+
+  config = {
+    users.users.${config.mods.user.name} = {
+      isNormalUser = true;
+      extraGroups = [ "wheel" ];
+      initialPassword = "changeme";
+    };
+  };
+}

modules/nixos/default.nix

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+{ pkgs, lib, ... }: {
+  imports = [
+    ./core
+    ./system
+    ./desktop
+  ];
+}

modules/nixos/desktop/default.nix

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+{ pkgs, lib, config, ... }: {
+  imports = [
+    ./xorg.nix
+    ./sound.nix
+  ];
+
+  options = {
+    mods.desktop.enable = lib.mkEnableOption "enables sound";
+  };
+
+  config = lib.mkIf config.mods.desktop.enable {
+    mods.xorg.enable = true;
+    mods.sound.enable = true;
+  };
+}

modules/nixos/desktop/sound.nix

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+{ pkgs, lib, config, ... }: {
+  options = {
+    mods.sound.enable = lib.mkEnableOption "enables sound";
+  };
+
+  config = lib.mkIf config.mods.sound.enable {
+      services.pipewire = {
+        enable = true;
+        pulse.enable = true;
+      };
+  };
+}

modules/nixos/desktop/xorg.nix

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+{ pkgs, lib, config, ... }: {
+  options = {
+    mods.xorg.enable = lib.mkEnableOption "enables xorg";
+  };
+
+  config = lib.mkIf config.mods.xorg.enable {
+    services.xserver.enable = true;
+    services.xserver.xkb.layout = "us";
+    services.xserver.xkb.options = "caps:escape";
+  };
+}

modules/nixos/system/default.nix

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+{ pkgs, lib, ... }: {
+  imports = [
+    ./locale.nix
+    ./programs.nix
+    ./services.nix
+  ];
+}

modules/nixos/system/locale.nix

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+{ pkgs, lib, config, ... }: {
+  time.timeZone = "Etc/UTC";
+
+  i18n.defaultLocale = "en_US.UTF-8";
+  console = if config.mods.xorg.enable then {
+    useXkbConfig = true;
+  } else {
+    keymap = "us";
+  };
+}

modules/nixos/system/programs.nix

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+{ pkgs, lib, ... }: {
+  environment.systemPackages = with pkgs; [
+    vim
+    wget
+  ];
+
+  programs.gnupg.agent = {
+    enable = true;
+    enableSSHSupport = true;
+  };
+}

modules/nixos/system/services.nix

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+{ pkgs, lib, ... }: {
+  services.openssh.enable = true;
+}

utils.nix

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+{ pkgs, inputs, system, ... }: {
+      mkHost = host: inputs.nixpkgs.lib.nixosSystem {
+        specialArgs = { inherit inputs system pkgs; };
+
+        modules = [
+          host
+          ./modules/nixos
+        ];
+      };
+
+      mkHome = host: inputs.home-manager.lib.homeMangerConfiguration {
+        inherit pkgs;
+
+        modules = [
+          host
+          ./modules/home
+        ];
+      };
+}