diff --git a/pkgs/development/python-modules/starkbank-ecdsa/default.nix b/pkgs/development/python-modules/starkbank-ecdsa/default.nix
index 5e64fa0f14c3..ecb04e1a5fda 100644
--- a/pkgs/development/python-modules/starkbank-ecdsa/default.nix
+++ b/pkgs/development/python-modules/starkbank-ecdsa/default.nix
@@ -3,20 +3,23 @@
   buildPythonPackage,
   fetchFromGitHub,
   pytestCheckHook,
+  setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "starkbank-ecdsa";
   version = "2.3.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "starkbank";
     repo = "ecdsa-python";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-5yF2tVCgHJX++NncWiYfLE0P98Sxy91VN3qgc8PSLOI=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   preCheck = ''
@@ -36,7 +39,7 @@ buildPythonPackage rec {
   meta = {
     description = "Python ECDSA library";
     homepage = "https://github.com/starkbank/ecdsa-python";
-    license = with lib.licenses; [ mit ];
+    license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})