From 72e89d74616d06080f897e2fb237c4845c264bf4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Tue, 4 Jun 2024 08:45:40 +0200
Subject: [PATCH] pkgs/top-level/make-tarball.nix: avoid hardlinks

---
 pkgs/top-level/make-tarball.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/top-level/make-tarball.nix b/pkgs/top-level/make-tarball.nix
index 78b90082547b..2fb6e97a711e 100644
--- a/pkgs/top-level/make-tarball.nix
+++ b/pkgs/top-level/make-tarball.nix
@@ -55,6 +55,8 @@ pkgs.releaseTools.sourceTarball {
     echo "file json-br $packages" >> $out/nix-support/hydra-build-products
   '';
 
+  # --hard-dereference: reproducibility for src if auto-optimise-store = true
+  #   Some context: https://github.com/NixOS/infra/issues/438
   distPhase = ''
     mkdir -p $out/tarballs
     XZ_OPT="-T0" tar \
@@ -71,6 +73,7 @@ pkgs.releaseTools.sourceTarball {
       --sort=name \
       --mtime="@$SOURCE_DATE_EPOCH" \
       --mode=ug+w \
+      --hard-dereference \
       $src $(pwd)/{.version-suffix,.git-revision}
   '';
 }