Begin the move to the import all, activate by config model

modules/system/settings/nix/default.nix

@@ -0,0 +1,19 @@
+{ ... }:
+{
+  nix = {
+    settings = {
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
+      auto-optimise-store = true;
+    };
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 1w";
+    };
+  };
+
+  nixpkgs.config.allowUnfree = true;
+}