diff --git a/pkgs/development/python-modules/cobs/default.nix b/pkgs/development/python-modules/cobs/default.nix
index d96d4e15fa2d..2dc6ba4641db 100644
--- a/pkgs/development/python-modules/cobs/default.nix
+++ b/pkgs/development/python-modules/cobs/default.nix
@@ -2,18 +2,23 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "cobs";
   version = "1.2.2";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-291eMhEdcnhvg9DCaSFdzWrGKbGsGWLGh4Ih87LKmNo=";
   };
 
+  build-system = [ setuptools ];
+
   checkPhase = ''
     runHook preCheck
 
@@ -38,4 +43,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ kip93 ];
   };
-}
+})