python310Packages.flake8-length: adjust build system

pkgs/development/python-modules/flake8-length/default.nix

@@ -1,14 +1,17 @@
 { lib
 , buildPythonPackage
-, pythonOlder
-, flake8
-, pytestCheckHook
 , fetchPypi
+, flake8
+, flit-core
+, pytestCheckHook
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "flake8-length";
   version = "0.3.1";
+  format = "pyproject";
+
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
@@ -16,17 +19,25 @@ buildPythonPackage rec {
     sha256 = "sha256-Dr1hTCU2G1STczXJsUPMGFYs1NpIAk1I95vxXsRTtRA=";
   };
 
+  nativeBuildInputs = [
+    flit-core
+  ];
+
   propagatedBuildInputs = [
     flake8
   ];
 
-  nativeCheckInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
 
   pythonImportsCheck = [
     "flake8_length"
   ];
 
-  pytestFlagsArray = [ "tests/" ];
+  pytestFlagsArray = [
+    "tests/"
+  ];
 
   meta = with lib; {
     description = "Flake8 plugin for a smart line length validation";