diff --git a/flake.lock b/flake.lock
index 67f87df..f35dbf6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,23 +1,5 @@
 {
   "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": 1752480373,
@@ -36,24 +18,8 @@
     },
     "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",
diff --git a/flake.nix b/flake.nix
index 476da66..9f05ba6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,20 +1,18 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = import nixpkgs { system = system; };
-        pyprojecttoml = nixpkgs.lib.importTOML ./pyproject.toml;
+  outputs = { self, nixpkgs }:
+    let
+      pyprojecttoml = nixpkgs.lib.importTOML ./pyproject.toml;
 
-        supermarktconnector = pkgs.python3Packages.buildPythonPackage {
+      supermarktconnector = { python3Packages, fetchFromGitHub }:
+        python3Packages.buildPythonPackage {
           pname = "supermarktconnector";
           version = "0.8.1-2";
           format = "setuptools";
-          src = pkgs.fetchFromGitHub {
+          src = fetchFromGitHub {
             owner = "bartmachielsen";
             repo = "SupermarktConnector";
             rev = "393c8698a34393f233a0bef45022954bfabe4247";
@@ -22,15 +20,15 @@
           };
         };
 
-      in rec {
-
-        packages.default = pkgs.python3Packages.buildPythonApplication {
+    in {
+      packages = builtins.mapAttrs (system: pkgs: rec {
+        default = pkgs.python3Packages.buildPythonApplication {
           pname = pyprojecttoml.project.name;
           version = pyprojecttoml.project.version;
           pyproject = true;
           src = self;
           dependencies = with pkgs.python3Packages; [ pyquery pytest requests ]
-            ++ [ supermarktconnector ];
+            ++ [ (pkgs.callPackage supermarktconnector {}) ];
           nativeBuildInputs = with pkgs.python3Packages; [ setuptools ];
           nativeCheckInputs = with pkgs.python3Packages; [ pytest ]
             ++ [ pkgs.ruff ];
@@ -43,13 +41,12 @@
           '';
         };
 
-        packages.editable = pkgs.python3Packages.mkPythonEditablePackage {
-          inherit (packages.default) pname version dependencies;
+        editable = pkgs.python3Packages.mkPythonEditablePackage {
+          inherit (default) pname version dependencies;
           scripts = pyprojecttoml.project.scripts;
           root = "$PWD/src";
-          passthru = { inherit (packages.default) nativeCheckInputs; };
+          passthru = { inherit (default) nativeCheckInputs; };
         };
-
-      }
-    );
+      }) nixpkgs.legacyPackages;
+    };
 }