refactor config with better structure

nixos/system/boot.nix

@@ -0,0 +1,26 @@
+{ pkgs, ... }:
+{
+  boot = {
+    kernelPackages = pkgs.linuxPackages_latest;
+
+    loader = {
+      systemd-boot.enable = true;
+      efi.canTouchEfiVariables = true;
+      # Skip the boot menu; hold Space while booting to show it.
+      timeout = 0;
+      # Keep /boot from filling up with old generations.
+      systemd-boot.configurationLimit = 5;
+    };
+
+    # Quiet boot
+    consoleLogLevel = 3;
+    initrd.verbose = false;
+    kernelParams = [
+      "quiet"
+      "udev.log_level=3"
+      "rd.udev.log_level=3"
+      "systemd.show_status=auto"
+      "rd.systemd.show_status=auto"
+    ];
+  };
+}

nixos/system/locale.nix

@@ -0,0 +1,4 @@
+{ ... }:
+{
+  time.timeZone = "Europe/Paris";
+}

nixos/system/networking.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  networking = {
+    hostName = "prouk";
+    networkmanager.enable = true;
+  };
+}

nixos/system/nix.nix

@@ -0,0 +1,32 @@
+{ ... }:
+{
+  nix.settings = {
+    experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
+    trusted-users = [ "prouk" ];
+
+    substituters = [
+      "https://cache.nixos.org"
+      "https://nix-community.cachix.org"
+    ];
+    trusted-public-keys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  # Housekeeping
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 14d";
+  };
+  nix.optimise.automatic = true;
+
+  # Run unpatched dynamic binaries.
+  programs.nix-ld.enable = true;
+}

nixos/system/users.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  users.users.prouk = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ];
+  };
+}