diff --git a/pkgs/development/python-modules/epc/default.nix b/pkgs/development/python-modules/epc/default.nix
index 735c8aa1ecc6..a7318528cfc7 100644
--- a/pkgs/development/python-modules/epc/default.nix
+++ b/pkgs/development/python-modules/epc/default.nix
@@ -3,19 +3,22 @@
   buildPythonPackage,
   fetchPypi,
   sexpdata,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "epc";
   version = "0.0.5";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "a14d2ea74817955a20eb00812e3a4630a132897eb4d976420240f1152c0d7d25";
   };
 
-  propagatedBuildInputs = [ sexpdata ];
+  build-system = [ setuptools ];
+
+  dependencies = [ sexpdata ];
   doCheck = false;
 
   meta = {