diff --git a/pkgs/development/python-modules/cachy/default.nix b/pkgs/development/python-modules/cachy/default.nix
index c59ef70c938c..393214ff3184 100644
--- a/pkgs/development/python-modules/cachy/default.nix
+++ b/pkgs/development/python-modules/cachy/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   redis,
   python-memcached,
   msgpack,
@@ -10,14 +11,16 @@
 buildPythonPackage rec {
   pname = "cachy";
   version = "0.3.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "186581f4ceb42a0bbe040c407da73c14092379b1e4c0e327fdb72ae4a9b269b1";
   };
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     redis
     python-memcached
     msgpack