diff --git a/pkgs/tools/backup/zfs-replicate/default.nix b/pkgs/tools/backup/zfs-replicate/default.nix
index 60a3d1b90120..94cb3790a567 100644
--- a/pkgs/tools/backup/zfs-replicate/default.nix
+++ b/pkgs/tools/backup/zfs-replicate/default.nix
@@ -1,5 +1,5 @@
-{ buildPythonApplication, click, fetchPypi, hypothesis, mypy, pytest
-, pytest-cov, pytest-runner, lib, stringcase
+{ buildPythonApplication, click, fetchPypi, hypothesis, pytest
+, lib, stringcase
 }:
 
 buildPythonApplication rec {
@@ -11,15 +11,14 @@ buildPythonApplication rec {
     sha256 = "b2cb9d4670a6e12d14a446c10d857862e91af6e4526f607e08b41bde89953bb8";
   };
 
+  postPatch = ''
+    sed -i setup.cfg \
+      -e '/--cov.*/d'
+  '';
+
   nativeCheckInputs = [
     hypothesis
-    mypy
     pytest
-    pytest-cov
-  ];
-
-  buildInputs = [
-    pytest-runner
   ];
 
   propagatedBuildInputs = [