diff --git a/pkgs/development/python-modules/importlib-resources/default.nix b/pkgs/development/python-modules/importlib-resources/default.nix
index 869762bec85e..61fb5be068d3 100644
--- a/pkgs/development/python-modules/importlib-resources/default.nix
+++ b/pkgs/development/python-modules/importlib-resources/default.nix
@@ -12,6 +12,7 @@
 buildPythonPackage rec {
   pname = "importlib-resources";
   version = "5.6.0";
+  format = "pyproject";
   disabled = isPy27;
 
   src = fetchPypi {