Changed flake to use flake-utils and build for all targets

flake.lock

@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1764950072,
@@ -18,8 +36,24 @@
     },
     "root": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -2,24 +2,26 @@
   description = "a lisp interpreter/compiler in ocaml";
   inputs =  {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = {self, nixpkgs}: 
+  outputs = {self, nixpkgs, flake-utils}:
+    flake-utils.lib.eachDefaultSystem (system:
   let
-    pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    pkgs = nixpkgs.legacyPackages.${system};
     devInputs = with pkgs.ocamlPackages; [merlin];
     ocamlPkgs = with pkgs.ocamlPackages; [menhir dune_3];
     nativeInputs =  with pkgs; ocamlPkgs ++ [ocaml]; 
   in
   {
-    packages.x86_64-linux.default = pkgs.ocamlPackages.buildDunePackage {
+    packages.default = pkgs.ocamlPackages.buildDunePackage {
       pname = "ollisp";
       version = "0.0.1";
       src = pkgs.lib.cleanSource ./.;
       nativeBuildInputs = nativeInputs;
     };
-    devShells.x86_64-linux.default = pkgs.mkShell {
+    devShells.default = pkgs.mkShell {
       nativeBuildInputs = nativeInputs ++ devInputs;
     };
-  };
+  });
 }