Trying something else

modules/system.nix

@@ -0,0 +1,17 @@
+{ rust-overlay, ... }:
+
+{
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+  };
+
+  nixpkgs = {
+    hostPlatform = "aarch64-darwin";
+    config.allowUnfree = true;
+    overlays = [ rust-overlay.overlays.default ];
+  };
+
+  programs.zsh.enable = true;
+  system.primaryUser = "atridad";
+  system.stateVersion = 6;
+}