From 7bcc2870c75a6cf1b4058b856489203753eb5684 Mon Sep 17 00:00:00 2001
From: Christopher Ostrouchov <chris.ostrouchov@gmail.com>
Date: Thu, 6 Sep 2018 14:40:43 -0400
Subject: [PATCH] pythonPackages.jupyterlab_launcher: refactor (#46178)

jupyterlab_launcher does not support python version < 3.5. Disabled
for older versions
---
 .../development/python-modules/jupyterlab_launcher/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/jupyterlab_launcher/default.nix b/pkgs/development/python-modules/jupyterlab_launcher/default.nix
index 1831b47ee79..af29b9155a5 100644
--- a/pkgs/development/python-modules/jupyterlab_launcher/default.nix
+++ b/pkgs/development/python-modules/jupyterlab_launcher/default.nix
@@ -1,7 +1,8 @@
-{ lib, buildPythonPackage, fetchPypi, jsonschema, notebook }:
+{ lib, buildPythonPackage, fetchPypi, jsonschema, notebook, pythonOlder }:
 buildPythonPackage rec {
   pname = "jupyterlab_launcher";
   version = "0.13.1";
+  disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;