From 29b168b81ad537b88d23630133385e5bf5e1411f Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <rekado@elephly.net>
Date: Sat, 17 Jan 2026 09:19:25 +0100
Subject: [PATCH] gnu: python-pytorch: Patch Python build.

* gnu/packages/machine-learning.scm (python-pytorch)[arguments]: Add phases
'patch-build-system to remove "__legacy__".

Change-Id: Ic2243bdb4539cca3a0a0ac955961feeec963c2e5
---
 gnu/packages/machine-learning.scm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/machine-learning.scm b/gnu/packages/machine-learning.scm
index f332c9d6a3b..07d5f68f822 100644
--- a/gnu/packages/machine-learning.scm
+++ b/gnu/packages/machine-learning.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2015-2025 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2015-2026 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2016, 2020-2024 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016, 2017, 2020 Marius Bakke <mbakke@fastmail.com>
 ;;; Copyright © 2016 Hartmut Goebel <h.goebel@crazy-compilers.com>
@@ -4606,6 +4606,11 @@ PyTorch.")
      (list
       #:phases
       #~(modify-phases %standard-phases
+          (add-after 'unpack 'patch-build-system
+            (lambda _
+              (substitute* "pyproject.toml"
+                (("setuptools\\.build_meta:__legacy__")
+                 "setuptools.build_meta"))))
           (add-after 'unpack 'cmake-patches
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (substitute* "cmake/Dependencies.cmake"