diff --git a/pkgs/development/python-modules/pep8-naming/default.nix b/pkgs/development/python-modules/pep8-naming/default.nix
index b2021b7776a0..9bfdbe89aab6 100644
--- a/pkgs/development/python-modules/pep8-naming/default.nix
+++ b/pkgs/development/python-modules/pep8-naming/default.nix
@@ -1,6 +1,5 @@
 { lib
 , fetchPypi
-, fetchpatch
 , buildPythonPackage
 , flake8
 , flake8-polyfill