In Trisquel 11, we have Guix 1.3.0, and with that, guix pull fails.
I used the guix-install.sh script from Guix 1.4.0 and verified its
integrity through the Parabola PCR package for it.
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
