Remove flake-utils dependency

flake.nix

@@ -3,54 +3,66 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-        python = pkgs.python3;
-        
-        # Define the application package
-        piratsApp = python.pkgs.buildPythonApplication {
-          pname = "pirats";
-          version = "0.1.0";
-          src = ./.;
-          format = "pyproject";
+  outputs = { self, nixpkgs, ... }:
+    let
+      # Systems to support
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      
+      # Helper to generate an attrset for all supported systems
+      forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system);
+    in
+    {
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          python = pkgs.python3;
+        in
+        {
+          default = python.pkgs.buildPythonApplication {
+            pname = "pirats";
+            version = "0.1.0";
+            src = ./.;
+            format = "pyproject";
 
-          nativeBuildInputs = with python.pkgs; [
-            setuptools
-            wheel
-          ];
+            nativeBuildInputs = with python.pkgs; [
+              setuptools
+              wheel
+            ];
 
-          propagatedBuildInputs = with python.pkgs; [
-            fastapi
-            sqlmodel
-            uvicorn
-            jinja2
-            python-multipart
-          ];
+            propagatedBuildInputs = with python.pkgs; [
+              fastapi
+              sqlmodel
+              uvicorn
+              jinja2
+              python-multipart
+            ];
 
-          nativeCheckInputs = with python.pkgs; [
-            pytestCheckHook
-          ];
+            nativeCheckInputs = with python.pkgs; [
+              pytestCheckHook
+            ];
 
-          pythonImportsCheck = [ "pirats" ];
-        };
-      in
-      {
-        packages.default = piratsApp;
-        packages.pirats = piratsApp;
+            pythonImportsCheck = [ "pirats" ];
+          };
+          pirats = self.packages.${system}.default;
+        }
+      );
+
+      devShells = forAllSystems (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            inputsFrom = [ self.packages.${system}.default ];
+            packages = with pkgs; [
+              pkgs.python3.pkgs.pytest
+            ];
+          };
+        }
+      );
 
-        devShells.default = pkgs.mkShell {
-          inputsFrom = [ piratsApp ];
-          packages = with pkgs; [
-            python.pkgs.pytest
-          ];
-        };
-      }
-    ) // {
       # NixOS Module to run the application as a service
       nixosModules.default = { config, lib, pkgs, ... }:
         let