From cd9e8d4292accc420118d32493081c047b8c79d0 Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Date: Fri, 2 Jan 2026 14:56:05 +0100
Subject: [PATCH] gnu: Fix reproducibility for some TeX Live packages.

* guix/build/texlive-build-system.scm (configure-texmf):
* gnu/packages/tex.scm (texlive-xindy-bin): Set TEXMFVAR to "/tmp" instead of
the current build directory as the latter's contents may leak into the package
output. For example, without this change LuaLaTeX, cache files were installed in the
output in every package relying on "lualatex" format.

Change-Id: I7d762b33a50e77af6b4eb1fb17d75dcc5eac950c
---
 gnu/packages/tex.scm                | 4 ++--
 guix/build/texlive-build-system.scm | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/gnu/packages/tex.scm b/gnu/packages/tex.scm
index b1ef5f5af06..aa2c74645ad 100644
--- a/gnu/packages/tex.scm
+++ b/gnu/packages/tex.scm
@@ -15,7 +15,7 @@
 ;;; Copyright © 2020 Vincent Legoll <vincent.legoll@gmail.com>
 ;;; Copyright © 2020, 2021 Paul Garlick <pgarlick@tourbillion-technology.com>
 ;;; Copyright © 2021, 2022 Maxim Cournoyer <maxim@guixotic.coop>
-;;; Copyright © 2021-2025 Nicolas Goaziou <mail@nicolasgoaziou.fr>
+;;; Copyright © 2021-2026 Nicolas Goaziou <mail@nicolasgoaziou.fr>
 ;;; Copyright © 2021 Leo Le Bouter <lle-bout@zaclys.net>
 ;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
 ;;; Copyright © 2021 Ivan Gankevich <i.gankevich@spbu.ru>
@@ -93839,7 +93839,7 @@ in terms of the collating order of the text being processed.")
               ;; HOME and therefore TEXMFVAR are unavailable.  Use a local
               ;; TEXMFVAR instead.
               (lambda _
-                (setenv "TEXMFVAR" (string-append (getcwd) "/texmf-var"))))
+                (setenv "TEXMFVAR" "/tmp")))
             (add-before 'install 'create-missing-directory
               ;; XXX: Install process does not create this directory.
               (lambda _
diff --git a/guix/build/texlive-build-system.scm b/guix/build/texlive-build-system.scm
index ec4466c0cf4..5695d18f9b2 100644
--- a/guix/build/texlive-build-system.scm
+++ b/guix/build/texlive-build-system.scm
@@ -2,7 +2,7 @@
 ;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Thiago Jung Bauermann <bauermann@kolabnow.com>
-;;; Copyright © 2023-2025 Nicolas Goaziou <mail@nicolasgoaziou.fr>
+;;; Copyright © 2023-2026 Nicolas Goaziou <mail@nicolasgoaziou.fr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -105,7 +105,7 @@ generation also needs to be wrapped within a `faketime' call in the
   ;; Default TEXMFVAR value is relative to $HOME, which is not set during
   ;; build.  This location is used for generating font metrics or building
   ;; documentation.
-  (setenv "TEXMFVAR" (string-append (getcwd) "/texmf-var"))
+  (setenv "TEXMFVAR" (or (getenv "TMPDIR") "/tmp"))
   ;; By default, a "ls-R" file must exist in TEXMFDIST.  However, it isn't
   ;; generated in the TeX Live tree used to build a package.  Consequently,
   ;; relax this requirement.