diff --git a/pkgs/by-name/ac/acltoolkit/package.nix b/pkgs/by-name/ac/acltoolkit/package.nix
index 1988da37dd21..835995193872 100644
--- a/pkgs/by-name/ac/acltoolkit/package.nix
+++ b/pkgs/by-name/ac/acltoolkit/package.nix
@@ -4,16 +4,15 @@
   fetchFromGitHub,
 }:
 
-python3Packages.buildPythonPackage {
+python3Packages.buildPythonPackage (finalAttrs: {
   pname = "acltoolkit";
   version = "0.2.2-unstable-2023-02-03";
   pyproject = true;
 
-  build-system = with python3Packages; [ setuptools ];
-
   src = fetchFromGitHub {
     owner = "zblurx";
     repo = "acltoolkit";
+    # https://github.com/zblurx/acltoolkit/issues/6
     rev = "a5219946aa445c0a3b4a406baea67b33f78bca7c";
     hash = "sha256-97cbkGyIkq2Pk1hydMcViXWoh+Ipi3m0YvEYiaV4zcM=";
   };
@@ -23,6 +22,8 @@ python3Packages.buildPythonPackage {
     sed -i -e "s/==[0-9.]*//" setup.py
   '';
 
+  build-system = with python3Packages; [ setuptools ];
+
   dependencies = with python3Packages; [
     asn1crypto
     dnspython
@@ -35,15 +36,13 @@ python3Packages.buildPythonPackage {
   # Project has no tests
   doCheck = false;
 
-  pythonImportsCheck = [
-    "acltoolkit"
-  ];
+  pythonImportsCheck = [ "acltoolkit" ];
 
   meta = {
     description = "ACL abuse swiss-knife";
-    mainProgram = "acltoolkit";
     homepage = "https://github.com/zblurx/acltoolkit";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
+    mainProgram = "acltoolkit";
   };
-}
+})