diff --git a/pkgs/development/python-modules/pvlib/default.nix b/pkgs/development/python-modules/pvlib/default.nix
index 3e140d95ab2b..986fd4ed8b4d 100644
--- a/pkgs/development/python-modules/pvlib/default.nix
+++ b/pkgs/development/python-modules/pvlib/default.nix
@@ -22,7 +22,7 @@
 buildPythonPackage rec {
   pname = "pvlib";
   version = "0.10.4";
-  format = "pyproject";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";