diff --git a/pkgs/development/python-modules/jsonmerge/default.nix b/pkgs/development/python-modules/jsonmerge/default.nix
index 1bcf41ccbcf7..9a5494e6bb34 100644
--- a/pkgs/development/python-modules/jsonmerge/default.nix
+++ b/pkgs/development/python-modules/jsonmerge/default.nix
@@ -4,28 +4,32 @@
   fetchPypi,
   jsonschema,
   pytestCheckHook,
+  setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "jsonmerge";
   version = "1.9.2";
 
-  format = "setuptools";
+  __structuredAttrs = true;
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-xDdX4BgLDhm3rkwTCtQqB8xYDDGRL2H0gj6Ory+jlKM=";
   };
 
-  propagatedBuildInputs = [ jsonschema ];
+  build-system = [ setuptools ];
+
+  dependencies = [ jsonschema ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
   meta = {
     description = "Merge a series of JSON documents";
     homepage = "https://github.com/avian2/jsonmerge";
-    changelog = "https://github.com/avian2/jsonmerge/blob/jsonmerge-${version}/ChangeLog";
+    changelog = "https://github.com/avian2/jsonmerge/blob/jsonmerge-${finalAttrs.version}/ChangeLog";
     license = lib.licenses.mit;
     maintainers = [ ];
   };
-}
+})