From 2fee354ae4be76a71bd0f4dc8b0a68cd6f55f9c0 Mon Sep 17 00:00:00 2001
From: Ivan Tkachev <ivan.tkachev@annalect.omd.ru>
Date: Fri, 9 Jul 2021 11:42:41 +0300
Subject: [PATCH] python3Packages.cattrs: disable for python older than 3.7

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

diff --git a/pkgs/development/python-modules/cattrs/default.nix b/pkgs/development/python-modules/cattrs/default.nix
index 7f51c89e3e4e..409fc7b28de5 100644
--- a/pkgs/development/python-modules/cattrs/default.nix
+++ b/pkgs/development/python-modules/cattrs/default.nix
@@ -1,6 +1,7 @@
 { lib
 , attrs
 , bson
+, pythonOlder
 , buildPythonPackage
 , fetchFromGitHub
 , hypothesis
@@ -18,6 +19,10 @@ buildPythonPackage rec {
   version = "1.7.0";
   format = "pyproject";
 
+  # https://cattrs.readthedocs.io/en/latest/history.html#id33:
+  # "Python 2, 3.5 and 3.6 support removal. If you need it, use a version below 1.1.0."
+  disabled = pythonOlder "3.7";
+
   src = fetchFromGitHub {
     owner = "Tinche";
     repo = pname;