nix flakes

configuration.nix

@@ -1,23 +1,6 @@
 { config, pkgs, ... }:
 {
-  imports =
-    [ # Include the results of the hardware scan.
-      ./hardware-configuration.nix
-      ./users.nix
-    ];
-
-  # Use the systemd-boot EFI boot loader.
-  boot.loader.grub = {
-    enable = true;
-    version = 2;
-    device = "/dev/vda";
-  };
-  networking.hostName = "nixbox"; # Define your hostname.
-
-  # Set your time zone.
   time.timeZone = "US/Eastern";
-
-  # Select internationalisation properties.
   i18n.defaultLocale = "en_US.UTF-8";
   console = {
     font = "Lat2-Terminus16";
@@ -42,10 +25,6 @@
   ];
 
   virtualisation.docker.enable = true;
-
-  # Some programs need SUID wrappers, can be configured further or are
-  # started in user sessions.
-  # programs.mtr.enable = true;
   programs.gnupg.agent = {
     enable = true;
     enableSSHSupport = true;
@@ -78,18 +57,5 @@
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
   networking.firewall.enable = false;
-
-  # Copy the NixOS configuration file and link it from the resulting system
-  # (/run/current-system/configuration.nix). This is useful in case you
-  # accidentally delete configuration.nix.
   system.copySystemConfiguration = true;
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "22.05"; # Did you read the comment?
 }
-

flake.lock

@@ -0,0 +1,78 @@
+{
+  "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1657887110,
+        "narHash": "sha256-8VV0/kZed2z8fGtEc2zr+WLxTow+JTIlMjnSisyv0GQ=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "4c5106ed0f3168ff2df21b646aef67e86cbfc11c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1654230545,
+        "narHash": "sha256-8Vlwf0x8ow6pPOK2a04bT+pxIeRnM1+O0Xv9/CuDzRs=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "236cc2971ac72acd90f0ae3a797f9f83098b17ec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1657815135,
+        "narHash": "sha256-+5Jby1ayRjtSgsM5IpRNeUgdcIutCKQWR6sypRtd1RE=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "c06d5fa9c605d143b15cafdbbb61c7c95388d76e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-22.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1653893745,
+        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,18 @@
+{
+  description = "Multi-user NixOS example";
+
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-22.05";
+  inputs.home-manager.url = "github:nix-community/home-manager";
+
+  outputs = { self, nixpkgs, home-manager, ... }: {
+    nixosConfigurations.nixbox = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules = [
+        home-manager.nixosModule
+        ./hardware.nix
+        ./configuration.nix
+        ./users.nix
+      ];
+    };
+  };
+}

hardware.nix

@@ -0,0 +1,34 @@
+# 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 + "/profiles/qemu-guest.nix") ];
+
+  # Use the systemd-boot EFI boot loader.
+  boot.loader.grub = {
+    enable = true;
+    version = 2;
+    device = "/dev/vda";
+  };
+  networking.hostName = "nixbox"; # Define your hostname.
+
+  boot.initrd.availableKernelModules = [ 
+    "ahci"  "xhci_pci" "virtio_pci"
+    "sr_mod" "virtio_blk"
+  ];
+
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-label/nixos";
+      fsType = "ext4";
+    };
+  networking.useDHCP = lib.mkDefault true;
+
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

users.nix

@@ -1,12 +1,8 @@
 { pkgs, ... }:
 let
-  home-manager = builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/master.tar.gz";
   prefix = "/server/project";
 in
 {
-  imports = [
-    (import "${home-manager}/nixos")
-  ];
 
   systemd.tmpfiles.rules = [
     "d /server 0777 root root"
@@ -34,7 +30,6 @@ in
     junikim = user { manager = true; name = "junikim"; passwd = "1234"; };
     a = user { zsh = true; name = "a"; passwd = "1234"; };
     b = user { name = "b"; passwd = "1234"; };
-    c = user { name = "c"; passwd = "1234"; };
   };