chore: Add Nix support on macos

flake.nix

@@ -3,29 +3,36 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
   };
 
-  outputs = { self, nixpkgs }:
-    let
-      pkgs = nixpkgs.legacyPackages.x86_64-linux;
-      pulumiBundle = pkgs.stdenv.mkDerivation {
-        name = "pulumi-bundle";
-        phases = [ "installPhase" "fixupPhase" ];
-        buildInputs = with pkgs; [ pulumi pulumiPackages.pulumi-language-go ];
-        installPhase = ''
-          mkdir -p $out/bin
-          mkdir -p $out/share
-          cp ${pkgs.pulumi}/bin/* $out/bin/
-          cp -r ${pkgs.pulumi}/share $out/share
-          cp ${pkgs.pulumiPackages.pulumi-language-go}/bin/* $out/bin/
-        '';
-      };
-    in
-    {
-      formatter.x86_64-linux = pkgs.nixpkgs-fmt;
-      devShells.x86_64-linux.default = pkgs.mkShell {
-        # Note that Go is not provided, because it does not behave correctly inside a Nix shell.
-        packages = [ pulumiBundle ];
+  outputs = inputs @ { self, nixpkgs, flake-parts }:
+    flake-parts.lib.mkFlake { inherit inputs; }
+      {
+        # systems that this flake can be used on
+        systems = [ "aarch64-darwin" "x86_64-linux" ];
+
+        perSystem = { config, pkgs, system, ... }:
+          let
+            pulumiBundle = pkgs.stdenv.mkDerivation {
+              name = "pulumi-bundle";
+              phases = [ "installPhase" "fixupPhase" ];
+              buildInputs = with pkgs; [ pulumi pulumiPackages.pulumi-language-go ];
+              installPhase = ''
+                mkdir -p $out/bin
+                mkdir -p $out/share
+                cp ${pkgs.pulumi}/bin/* $out/bin/
+                cp -r ${pkgs.pulumi}/share $out/share
+                cp ${pkgs.pulumiPackages.pulumi-language-go}/bin/* $out/bin/
+              '';
+            };
+          in
+          {
+            formatter = pkgs.nixpkgs-fmt;
+            devShells.default = pkgs.mkShell {
+              # Note that Go is not provided, because it does not behave correctly inside a Nix shell.
+              packages = [ pulumiBundle ];
+            };
+          };
       };
-    };
 }