diff --git a/pkgs/development/python-modules/yargy/default.nix b/pkgs/development/python-modules/yargy/default.nix
index 3617055f03ec..e1dd6454c44a 100644
--- a/pkgs/development/python-modules/yargy/default.nix
+++ b/pkgs/development/python-modules/yargy/default.nix
@@ -2,21 +2,26 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   pymorphy2,
   pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "yargy";
   version = "0.16.0";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-yRfu+zKkDCPEa2yojWiScHLdAKuU6Q/V3GqwpitZtZM=";
   };
 
-  propagatedBuildInputs = [ pymorphy2 ];
+  build-system = [ setuptools ];
+
+  dependencies = [ pymorphy2 ];
   pythonImportsCheck = [ "yargy" ];
   nativeCheckInputs = [ pytestCheckHook ];
   enabledTestPaths = [ "tests" ];
@@ -27,4 +32,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ npatsakula ];
   };
-}
+})