From 69e38791469be02258a3de454f82a77d5c800e2e Mon Sep 17 00:00:00 2001
From: Abus <git@abus.sh>
Date: Wed, 23 Sep 2026 10:31:41 -0400
Subject: [PATCH] python314Packages.base64io: fix
 test_base64io_decode_readlines test

---
 pkgs/development/python-modules/base64io/default.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/development/python-modules/base64io/default.nix b/pkgs/development/python-modules/base64io/default.nix
index e49670f6e856..1ad27019725b 100644
--- a/pkgs/development/python-modules/base64io/default.nix
+++ b/pkgs/development/python-modules/base64io/default.nix
@@ -6,6 +6,7 @@
   pytestCheckHook,
   setuptools,
   unstableGitUpdater,
+  fetchpatch2,
 }:
 
 buildPythonPackage rec {
@@ -20,6 +21,14 @@ buildPythonPackage rec {
     hash = "sha256-1MUWjFFitJ3nqvVwAQYcAVVPhPs6NEgq7t/mI71u2Bk=";
   };
 
+  patches = [
+    (fetchpatch2 {
+      name = "default-buffer-size-compat.patch";
+      url = "https://github.com/abus-sh/base64io-python/commit/a929dc3c9d873eabe491ccae9a2d0d57726f37da.patch?full_index=1";
+      hash = "sha256-VfPOZ8cDRW2mQy6ROl77kBRE780NhH4kbjkyD1/jMRk=";
+    })
+  ];
+
   build-system = [ setuptools ];
 
   nativeCheckInputs = [