On Thu, Aug 09, 2018 at 05:04:29PM +0200, Björn Höfling wrote:
> This is a fix for core-updates.
> 
> The libgcrypt package contains a yat2m command that adds a timestamp
> into the generated man-page. The (more or less) same C-file exits
> also in the packages gnupg and libgpg-error. There it already considers
> SOURCE_DATE_EPOCH. I diffed from gnupg and removed unrelated things.
> 
> I will also report upstream.

Thanks, please reply with a link to the upstream discussion.

> From 908c760f89ae5b47edbb0124339eab5801196f62 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Bj=C3=B6rn=20H=C3=B6fling?=
>  <bjoern.hoefling@bjoernhoefling.de>
> Date: Thu, 9 Aug 2018 16:45:45 +0200
> Subject: [PATCH] gnu: libgcrypt: Make build reproducible.
> 
> * gnu/packages/patches/libgcrypt-make-yat2m-reproducible.patch: New file.
> * gnu/local.mk (dist_patch_DATA): Add it.
> * gnu/packages/gnupg.scm (libgcrypt)[source]: Use it.

Pushed as 4866cba66ae40d722bb6c50b7dca27725ffa4532