diff --git a/pkgs/development/python-modules/nestedtext/default.nix b/pkgs/development/python-modules/nestedtext/default.nix
index 572091daa874..4f1705343b24 100644
--- a/pkgs/development/python-modules/nestedtext/default.nix
+++ b/pkgs/development/python-modules/nestedtext/default.nix
@@ -5,12 +5,16 @@
 , inform
 , natsort
 , pytestCheckHook
+, pythonOlder
 , voluptuous
 }:
 
 buildPythonPackage rec {
   pname = "nestedtext";
   version = "1.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "KenKundert";