diff --git a/pkgs/development/python-modules/pytools/default.nix b/pkgs/development/python-modules/pytools/default.nix
index d9a5bbd73fb4..f8f9ef27ff9c 100644
--- a/pkgs/development/python-modules/pytools/default.nix
+++ b/pkgs/development/python-modules/pytools/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, pythonOlder
 , decorator
 , appdirs
 , six
@@ -11,6 +12,7 @@
 buildPythonPackage rec {
   pname = "pytools";
   version = "2020.4";
+  disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;