diff --git a/pkgs/development/python-modules/mitogen/default.nix b/pkgs/development/python-modules/mitogen/default.nix
index 41bbb18fba01..ea710516df68 100644
--- a/pkgs/development/python-modules/mitogen/default.nix
+++ b/pkgs/development/python-modules/mitogen/default.nix
@@ -1,8 +1,9 @@
-{ lib
-, buildPythonPackage
-, fetchFromGitHub
-, pythonOlder
-, setuptools
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  pythonOlder,
+  setuptools,
 }:
 
 buildPythonPackage rec {
@@ -19,16 +20,12 @@ buildPythonPackage rec {
     hash = "sha256-zQTto4SGPvQIXPAcTQx8FA+n/5RcpqKKn0UqlFM2yqI=";
   };
 
-  build-system = [
-    setuptools
-  ];
+  build-system = [ setuptools ];
 
   # Tests require network access and Docker support
   doCheck = false;
 
-  pythonImportsCheck = [
-    "mitogen"
-  ];
+  pythonImportsCheck = [ "mitogen" ];
 
   meta = with lib; {
     description = "Python Library for writing distributed self-replicating programs";