diff --git a/pkgs/development/python-modules/gitdb/default.nix b/pkgs/development/python-modules/gitdb/default.nix
index 5c3bd4ac43fc..1ad0b320da84 100644
--- a/pkgs/development/python-modules/gitdb/default.nix
+++ b/pkgs/development/python-modules/gitdb/default.nix
@@ -17,6 +17,10 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ smmap ];
 
+  postPatch = ''
+    substituteInPlace setup.py --replace ",<4" ""
+  '';
+
   # Bunch of tests fail because they need an actual git repo
   doCheck = false;