From 1bcbbe08e4668fcf7e03159738caf657fc80e819 Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Wed, 6 Feb 2019 22:00:48 -0500
Subject: [PATCH] keyutils: patch out unreproducibility

---
 pkgs/os-specific/linux/keyutils/default.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/os-specific/linux/keyutils/default.nix b/pkgs/os-specific/linux/keyutils/default.nix
index 8b8f5a05f94..1d9497a7edd 100644
--- a/pkgs/os-specific/linux/keyutils/default.nix
+++ b/pkgs/os-specific/linux/keyutils/default.nix
@@ -9,6 +9,15 @@ stdenv.mkDerivation rec {
     sha256 = "05bi5ja6f3h3kdi7p9dihlqlfrsmi1wh1r2bdgxc0180xh6g5bnk";
   };
 
+  patches = [
+    (fetchurl {
+      # improve reproducibility
+      url = "https://salsa.debian.org/debian/keyutils/raw/4cecffcb8e2a2aa4ef41777ed40e4e4bcfb2e5bf/debian/patches/Make-build-reproducible.patch";
+      sha256 = "0wnvbjfrbk7rghd032z684l7vk7mhy3bd41zvhkrhgp3cd5id0bm";
+    })
+  ];
+
+  BUILDDATE = "1970-01-01";
   outputs = [ "out" "lib" "dev" ];
 
   installFlags = [