diff --git a/pkgs/development/python-modules/rjsmin/default.nix b/pkgs/development/python-modules/rjsmin/default.nix
index a5efd48ebf7..1499299e98b 100644
--- a/pkgs/development/python-modules/rjsmin/default.nix
+++ b/pkgs/development/python-modules/rjsmin/default.nix
@@ -1,11 +1,15 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "rjsmin";
   version = "1.2.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;