Initial working config.

modules/flake-parts.nix

@@ -0,0 +1,22 @@
+{inputs, ...}: {
+  imports = [
+    inputs.flake-parts.flakeModules.modules
+  ];
+
+  options = {
+    flake = inputs.flake-parts.lib.mkSubmoduleOptions {
+      wrapperModules = inputs.nixpkgs.lib.mkOption {
+        default = {};
+      };
+    };
+  };
+
+  config = {
+    systems = [
+      "aarch64-darwin"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "x86_64-linux"
+    ];
+  };
+}