diff --git a/pkgs/development/python-modules/green/default.nix b/pkgs/development/python-modules/green/default.nix
index 47cb8ad08031..b1bc8a007b72 100644
--- a/pkgs/development/python-modules/green/default.nix
+++ b/pkgs/development/python-modules/green/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, isPy3k
+, pythonOlder
 , fetchPypi
 , django
 , colorama
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   version = "3.4.3";
   format = "setuptools";
 
-  disabled = !isPy3k;
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;