diff --git a/pkgs/development/python-modules/treelog/default.nix b/pkgs/development/python-modules/treelog/default.nix
index a25eedf5df7b..f4d6ffbd9901 100644
--- a/pkgs/development/python-modules/treelog/default.nix
+++ b/pkgs/development/python-modules/treelog/default.nix
@@ -2,22 +2,25 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   typing-extensions,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "treelog";
   version = "1.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     sha256 = "0hnivz4p4llky6djxgcsr9r3j4vr46mkjvp0ksybhpx0fsnhdi81";
   };
 
-  pythonImportsCheck = [ "treelog" ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [ typing-extensions ];
+  dependencies = [ typing-extensions ];
+
+  pythonImportsCheck = [ "treelog" ];
 
   meta = {
     description = "Logging framework that organizes messages in a tree structure";
@@ -25,4 +28,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = [ ];
   };
-}
+})