diff --git a/pkgs/development/python-modules/gwcs/default.nix b/pkgs/development/python-modules/gwcs/default.nix
index 5f9d43c78d73..7053149a64d5 100644
--- a/pkgs/development/python-modules/gwcs/default.nix
+++ b/pkgs/development/python-modules/gwcs/default.nix
@@ -25,6 +25,10 @@ buildPythonPackage (finalAttrs: {
     hash = "sha256-0iUnapBn8yDCx1tqHD10Ljid15yBuqlICyFuva2LNPk=";
   };
 
+  postPatch = ''
+    sed -i "/--doctest-rst/d" pyproject.toml
+  '';
+
   build-system = [
     setuptools
     setuptools-scm
@@ -39,9 +43,7 @@ buildPythonPackage (finalAttrs: {
     scipy
   ];
 
-  nativeCheckInputs = [
-    pytestCheckHook
-  ];
+  nativeCheckInputs = [ pytestCheckHook ];
 
   pythonImportsCheck = [ "gwcs" ];