diff --git a/pkgs/development/python-modules/userpath/default.nix b/pkgs/development/python-modules/userpath/default.nix
index 430e41799dd4..014de3cfeb1e 100644
--- a/pkgs/development/python-modules/userpath/default.nix
+++ b/pkgs/development/python-modules/userpath/default.nix
@@ -9,7 +9,7 @@
 buildPythonPackage rec {
   pname = "userpath";
   version = "1.9.2";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";