From a43e841f9a7e2671a7515f54ba5f9293abf53a56 Mon Sep 17 00:00:00 2001
From: Florian Franzen <Florian.Franzen@gmail.com>
Date: Fri, 25 Sep 2026 04:30:49 +0200
Subject: [PATCH] python3Packages.untokenize: fix build with Python 3.14

---
 .../development/python-modules/untokenize/default.nix | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/python-modules/untokenize/default.nix b/pkgs/development/python-modules/untokenize/default.nix
index b12a9f382db7..d20b84fd01de 100644
--- a/pkgs/development/python-modules/untokenize/default.nix
+++ b/pkgs/development/python-modules/untokenize/default.nix
@@ -2,7 +2,6 @@
   lib,
   buildPythonPackage,
   fetchPypi,
-  pythonAtLeast,
   unittestCheckHook,
 }:
 
@@ -11,14 +10,18 @@ buildPythonPackage rec {
   version = "0.1.1";
   format = "setuptools";
 
-  # https://github.com/myint/untokenize/issues/4
-  disabled = pythonAtLeast "3.14";
-
   src = fetchPypi {
     inherit pname version;
     sha256 = "3865dbbbb8efb4bb5eaa72f1be7f3e0be00ea8b7f125c69cbd1f5fda926f37a2";
   };
 
+  # the deprecated ast.Constant.s alias was removed in Python 3.14
+  # https://github.com/myint/untokenize/pull/6
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace-fail "body[0].value.s" "body[0].value.value"
+  '';
+
   nativeCheckInputs = [ unittestCheckHook ];
 
   meta = {