diff --git a/pkgs/development/python-modules/winsspi/default.nix b/pkgs/development/python-modules/winsspi/default.nix
index f9e12c9c973a..fdcb27c6c319 100644
--- a/pkgs/development/python-modules/winsspi/default.nix
+++ b/pkgs/development/python-modules/winsspi/default.nix
@@ -2,20 +2,25 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   minikerberos,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "winsspi";
   version = "0.0.11";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-AXC6SJ+iWPGqTmdgoWKEbD8tDUUcg2aD609hO2bdQfM=";
   };
 
-  propagatedBuildInputs = [ minikerberos ];
+  build-system = [ setuptools ];
+
+  dependencies = [ minikerberos ];
 
   # Module doesn't have tests
   doCheck = false;
@@ -28,4 +33,4 @@ buildPythonPackage rec {
     license = with lib.licenses; [ mit ];
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})