diff --git a/pkgs/development/python-modules/bthome-ble/default.nix b/pkgs/development/python-modules/bthome-ble/default.nix
index 742ced21e132..3c167ad2bfbc 100644
--- a/pkgs/development/python-modules/bthome-ble/default.nix
+++ b/pkgs/development/python-modules/bthome-ble/default.nix
@@ -14,7 +14,7 @@
 buildPythonPackage rec {
   pname = "bthome-ble";
   version = "3.7.0";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.9";