Danny Milosavljevic <dannym@scratchpost.org> writes:

> Hi Ludo,
>
> On Sun, 09 Jul 2017 21:51:08 +0200
> ludo@gnu.org (Ludovic Courtès) wrote:
>> Debian has a SOURCE_DATE_EPOCH patch:
>> 
>>   http://sources.debian.net/patches/groff/1.22.3-9/source-date-epoch.patch/
>> 
>> Perhaps we could just use that?  That way, the default behavior of groff
>> would remained unchanged.
>
> Yeah, it seems to work fine.
>
> Apparently git send-email doesn't work for me right now.
>
> So I attached the patch manually here...

[...]

> -                     "1998v2kcs288d3y7kfxpvl369nqi06zbbvjzafyvyl3pr7bajj1s"))))
> +                     "1998v2kcs288d3y7kfxpvl369nqi06zbbvjzafyvyl3pr7bajj1s"))
> +            (patches (search-patches "groff-source-date-epoch.patch"))
> +            (modules '((guix build utils)))))

(guix build utils) is no longer needed. Apart from that LGTM!