diff --git a/pkgs/development/python-modules/casttube/default.nix b/pkgs/development/python-modules/casttube/default.nix
index 19a7a0926ced..2fd66c71a9a3 100644
--- a/pkgs/development/python-modules/casttube/default.nix
+++ b/pkgs/development/python-modules/casttube/default.nix
@@ -3,19 +3,22 @@
   buildPythonPackage,
   fetchPypi,
   requests,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "casttube";
   version = "0.2.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "10pw2sjy648pvp42lbbdmkkx79bqlkq1xcbzp1frraj9g66azljl";
   };
 
-  propagatedBuildInputs = [ requests ];
+  build-system = [ setuptools ];
+
+  dependencies = [ requests ];
 
   # no tests
   doCheck = false;