diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a577dcafd37..cbc5a83626c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10510,15 +10510,24 @@ in modules // {
 
   flake8 = buildPythonPackage rec {
     name = "flake8-${version}";
-    version = "2.5.4";
+    version = "3.0.4";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/f/flake8/${name}.tar.gz";
-      sha256 = "0bs9cz4fr99r2rwig1b8jwaadl1nan7kgpdzqwj0bwbckwbmh7nc";
+      sha256 = "03cpdrjxh0fyi2qpdxbbrmxw7whiq3xr3p958gr6yzghk34i1hml";
     };
 
     buildInputs = with self; [ nose mock ];
-    propagatedBuildInputs = with self; [ pyflakes pep8 mccabe ];
+    propagatedBuildInputs = with self; [ pyflakes pep8 mccabe enum34 configparser pycodestyle ];
+
+    patches = [
+      ../development/python-modules/flake8/move-pytest-config-to-pytest-ini.patch
+    ];
+
+    # Tests fail due to missing ini file.
+    preCheck = ''
+      touch tox.ini
+    '';
 
     meta = {
       description = "Code checking using pep8 and pyflakes";