Start from scratch

modules/base/home.nix

@@ -0,0 +1,13 @@
+{
+  flake.modules.homeManager.base = {
+    programs.home-manager.enable = true;
+
+    services = {
+      home-manager.autoExpire = {
+        enable = true;
+        frequency = "weekly";
+        store.cleanup = true;
+      };
+    };
+  };
+}

modules/base/network/default.nix

@@ -0,0 +1,24 @@
+{
+  flake.modules.nixos.base =
+    { hostConfig, ... }:
+    {
+      networking = {
+        hostName = hostConfig.name;
+
+        networkmanager = {
+          enable = true;
+        };
+
+        useDHCP = false;
+      };
+
+      systemd = {
+        services.NetworkManager-wait-online.enable = false;
+        network.wait-online.enable = false;
+      };
+
+      services.resolved = {
+        enable = true;
+      };
+    };
+}

modules/base/system/default.nix

@@ -0,0 +1,25 @@
+{
+  flake.modules =
+    let
+      stateVersion = "25.05";
+    in
+    {
+      homeManager.base = {
+        home = {
+          inherit stateVersion;
+        };
+      };
+
+      nixos.base = {
+        system = {
+          # 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://search.nixos.org/options?&show=system.stateVersion&from=0&size=50&sort=relevance&type=packages&query=stateVersion).
+          inherit stateVersion;
+        };
+      };
+    };
+}