common aspects reworked into base aspect

aspects/base/nix.nix

@@ -0,0 +1,43 @@
+{ ... }:
+{
+  flake.modules.nixos.nix =
+    { inputs, ... }:
+    {
+      imports = [ inputs.nixos-cli.nixosModules.nixos-cli ];
+
+      nix = {
+        settings = {
+          auto-optimise-store = true;
+          connect-timeout = 10;
+          log-lines = 25;
+          min-free = 128000000;
+          max-free = 1000000000;
+          trusted-users = [ "@wheel" ];
+        };
+        extraOptions = "experimental-features = nix-command flakes";
+        gc = {
+          automatic = true;
+          options = "--delete-older-than 8d";
+        };
+      };
+
+      nixpkgs.config = {
+        allowUnfree = true;
+        enableParallelBuilding = true;
+        buildManPages = false;
+        buildDocs = false;
+      };
+
+      services.nixos-cli = {
+        enable = true;
+        config = {
+          use_nvd = true;
+          ignore_dirty_tree = true;
+          apply.reexec_as_root = true;
+          confirmation.empty = "default-yes";
+        };
+      };
+
+      system.stateVersion = "22.11";
+    };
+}