mergemaster option -m (was: etcupdate failed to build new tree)

On 01/01/2021 19:24, Herbert J. Skuhra wrote:

> On Fri, 01 Jan 2021 20:01:16 +0100, Graham Perrin wrote:
>
>> …
>>
>> I did try `mergemaster -p` and somehow (!) ended up with an empty
>> `/etc/group` file. Dug myself out of that hole, I'll prefer to
>> continue using etcupdate.
> -m /path/to/sources
>                   Specify the path to the directory where you want to do the
>                   make(1).


Thank you, what path would you suggest?

(Given the previous weirdness, I want to make no guesses here.)