diff --git a/pkgs/development/python-modules/mscerts/default.nix b/pkgs/development/python-modules/mscerts/default.nix
index 26949c606675..6d7642c89470 100644
--- a/pkgs/development/python-modules/mscerts/default.nix
+++ b/pkgs/development/python-modules/mscerts/default.nix
@@ -2,12 +2,13 @@
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
+, setuptools
 }:
 
 buildPythonPackage rec {
   pname = "mscerts";
   version = "2024.3.27";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -18,6 +19,10 @@ buildPythonPackage rec {
     hash = "sha256-Hucf3tToYm3P6ebKNlUs5V+X1B95u9P2UC1yOItZOhc=";
   };
 
+  build-system = [
+    setuptools
+  ];
+
   # extras_require contains signify -> circular dependency
 
   # Module has no tests