Hu Julien,

looking at PostGIS:

On Mon, 16 Apr 2018 11:18:21 +0200
Julien Lepiller <julien@lepiller.eu> wrote:

> Hi, here are two patches to add postgis and its dependency gdal.

+    (description " PostGIS is a spatial database extender for PostgreSQL

--> There is a space at the beginning.

Besides of that, this looks good.

I have successfully tried shp2pgsql. 

I have not tried and have no idea of how to use Postgresql+PostGIS
within GuixSD or with a temp database in a Guix container.

Thanks,

Björn