diff --git a/pkgs/development/python-modules/shapely/default.nix b/pkgs/development/python-modules/shapely/default.nix
index 785cacb320ae..3db9ce9e2af6 100644
--- a/pkgs/development/python-modules/shapely/default.nix
+++ b/pkgs/development/python-modules/shapely/default.nix
@@ -16,7 +16,7 @@
 buildPythonPackage rec {
   pname = "shapely";
   version = "2.0.3";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";