From 60853eb21de51dc4e9576d05ba685b8eb6058cb8 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
Signed-off-by: Rutherther <rutherther@ditigal.xyz>
---
 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 b1ef5f5af06c21f9781418355e6347ed77b23d55..aa2c74645ad69dcc9cd88770e60c347522ed3e10 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 ec4466c0cf4c1e230d09dfb0331f2d9faecf01db..5695d18f9b2a33993fdeb80fa71b5df330a9db3b 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.