diff --git a/pkgs/development/python-modules/mdformat/default.nix b/pkgs/development/python-modules/mdformat/default.nix
index 921ba4d33604..114685e2f46d 100644
--- a/pkgs/development/python-modules/mdformat/default.nix
+++ b/pkgs/development/python-modules/mdformat/default.nix
@@ -6,6 +6,7 @@
 , poetry-core
 , pytestCheckHook
 , pythonOlder
+, setuptools
 , tomli
 , typing-extensions
 }:
@@ -26,6 +27,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     poetry-core
+    setuptools
   ];
 
   propagatedBuildInputs = [