diff --git a/pkgs/development/python-modules/betamax-serializers/default.nix b/pkgs/development/python-modules/betamax-serializers/default.nix
index 0f3217269062..2a56ddf99fd5 100644
--- a/pkgs/development/python-modules/betamax-serializers/default.nix
+++ b/pkgs/development/python-modules/betamax-serializers/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   betamax,
   pyyaml,
 }:
@@ -9,13 +10,15 @@
 buildPythonPackage rec {
   pname = "betamax-serializers";
   version = "0.2.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "0ja9isbjmzzhxdj69s0kdsvw8nkp073w6an6a4liy5vk3fdl2p1l";
   };
 
+  build-system = [ setuptools ];
+
   buildInputs = [
     betamax
     pyyaml