From e83feaecff5fed7e96ea7055679bee5fdfbeaa74 Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Sun, 20 Jun 2021 20:37:51 +0200
Subject: [PATCH] python3Packages.markdown-it-py: relax attrs contraint

---
 .../python-modules/markdown-it-py/default.nix    | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/markdown-it-py/default.nix b/pkgs/development/python-modules/markdown-it-py/default.nix
index 322c4ac533d2..dc8866350b1f 100644
--- a/pkgs/development/python-modules/markdown-it-py/default.nix
+++ b/pkgs/development/python-modules/markdown-it-py/default.nix
@@ -1,4 +1,9 @@
-{ lib, buildPythonPackage, fetchFromGitHub, pytestCheckHook, pythonOlder
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, fetchpatch
+, pytestCheckHook
+, pythonOlder
 , attrs
 , linkify-it-py
 , psutil
@@ -21,6 +26,15 @@ buildPythonPackage rec {
     hash = "sha256-GA7P2I8N+i2ISsVgx58zyhrfKMcZ7pL4X9T/trbsr1Y=";
   };
 
+  patches = [
+    (fetchpatch {
+      # :arrow_up: UPGRADE: attrs -> v21 (#165)
+      # https://github.com/executablebooks/markdown-it-py/pull/165
+      url = "https://github.com/executablebooks/markdown-it-py/commit/78381ffe1a651741594dc93e693b761422512fa2.patch";
+      sha256 = "1kxhblpi4sycrs3rv50achr8g0wlgq33abg2acra26l736hlsya1";
+    })
+  ];
+
   propagatedBuildInputs = [ attrs linkify-it-py ]
     ++ lib.optional (pythonOlder "3.8") typing-extensions;