diff --git a/pkgs/development/python-modules/pytest/4.nix b/pkgs/development/python-modules/pytest/4.nix
index c764b55d1f10..fd6d3507afb8 100644
--- a/pkgs/development/python-modules/pytest/4.nix
+++ b/pkgs/development/python-modules/pytest/4.nix
@@ -11,6 +11,11 @@ buildPythonPackage rec {
     sha256 = "50fa82392f2120cc3ec2ca0a75ee615be4c479e66669789771f1758332be4353";
   };
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "pluggy>=0.12,<1.0" "pluggy>=0.12,<2.0"
+  '';
+
   checkInputs = [ hypothesis mock ];
   buildInputs = [ setuptools-scm ];
   propagatedBuildInputs = [ attrs py setuptools six pluggy more-itertools atomicwrites wcwidth packaging ]