diff --git a/flake.lock b/flake.lock
index d7e7584..6eacb3a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,41 +18,7 @@
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs",
-        "utils": "utils"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "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": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 9a22931..465cae9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,12 +1,16 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, utils }:
+  outputs = { self, nixpkgs }:
     let
       inherit (nixpkgs) lib;
+
+      forAllSystems = function: lib.genAttrs
+        [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ]
+        (system: function nixpkgs.legacyPackages.${system});
+
       deadnixLambda = pkgs:
         pkgs.rustPlatform.buildRustPackage {
           pname = "deadnix";
@@ -35,32 +39,28 @@
             maintainers = with maintainers; [ astro ];
           };
         };
-    in
-    utils.lib.eachDefaultSystem
-      (system:
-        let
-          pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      packages = forAllSystems (pkgs: {
+        default = self.packages.${pkgs.system}.deadnix;
+        deadnix = deadnixLambda pkgs;
+      });
 
-          packages = {
-            default = self.packages."${system}".deadnix;
-            deadnix = deadnixLambda pkgs;
-          };
-        in
-        {
-          inherit packages;
+      checks = self.packages;
 
-          checks = packages;
+      apps = forAllSystems (pkgs: {
+        default = {
+          type = "app";
+          program = lib.getExe self.packages.${pkgs.system}.default;
+        };
+      });
 
-          apps.default = utils.lib.mkApp {
-            drv = self.packages."${system}".default;
-          };
+      devShells = forAllSystems (pkgs: {
+        default = with pkgs; mkShell {
+          nativeBuildInputs = [ cargo rustc rustfmt rustPackages.clippy rust-analyzer libiconv ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+        };
+      });
 
-          devShells.default = with pkgs; mkShell {
-            nativeBuildInputs = [ cargo rustc rustfmt rustPackages.clippy rust-analyzer libiconv ];
-            RUST_SRC_PATH = rustPlatform.rustLibSrc;
-          };
-        })
-    // {
       overlays.default = (final: _: {
         deadnix = deadnixLambda final;
       });