From 5a7000ff2706297f68cb149b5c60cc9439655956 Mon Sep 17 00:00:00 2001
From: Justin Bedo <cu@cua0.org>
Date: Wed, 17 Nov 2021 22:10:51 +1100
Subject: [PATCH] rPackages.buildRPackage: set built-timestamp to epoch

---
 pkgs/development/r-modules/generic-builder.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/r-modules/generic-builder.nix b/pkgs/development/r-modules/generic-builder.nix
index 7201bab40e12..880fff44ed64 100644
--- a/pkgs/development/r-modules/generic-builder.nix
+++ b/pkgs/development/r-modules/generic-builder.nix
@@ -36,7 +36,7 @@ stdenv.mkDerivation ({
   installPhase = ''
     runHook preInstall
     mkdir -p $out/library
-    $rCommand CMD INSTALL $installFlags --configure-args="$configureFlags" -l $out/library .
+    $rCommand CMD INSTALL --built-timestamp='1970-01-01 00:00:00 UTC' $installFlags --configure-args="$configureFlags" -l $out/library .
     runHook postInstall
   '';