From e28313352094a8029c2cb9b10dac4dd812508cea Mon Sep 17 00:00:00 2001
From: Tom Hunger <tehunger@gmail.com>
Date: Sun, 20 Sep 2020 22:30:50 +0100
Subject: [PATCH] distributed: disable build for Python older than 3.6

---
 pkgs/development/python-modules/distributed/default.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/distributed/default.nix b/pkgs/development/python-modules/distributed/default.nix
index fe4213d13f0..91f6f06f6d9 100644
--- a/pkgs/development/python-modules/distributed/default.nix
+++ b/pkgs/development/python-modules/distributed/default.nix
@@ -23,6 +23,7 @@
 , singledispatch
 , mpi4py
 , bokeh
+, pythonOlder
 }:
 
 buildPythonPackage rec {
@@ -35,11 +36,13 @@ buildPythonPackage rec {
     sha256 = "469e505fd7ce75f600188bdb69a95641899d5b372f74246c8f308376b6929e9c";
   };
 
+  disabled = pythonOlder "3.6";
+
   checkInputs = [ pytest pytest-repeat pytest-timeout mock joblib ];
   propagatedBuildInputs = [
       click cloudpickle dask msgpack psutil six
       sortedcontainers tblib toolz tornado zict pyyaml mpi4py bokeh
-  ] ++ lib.optionals (!isPy3k) [ futures singledispatch ];
+  ];
 
   # tests take about 10-15 minutes
   # ignore 5 cli tests out of 1000 total tests that fail due to subprocesses