arm image ; daemon-socket error

[rhombus]

after manually installing guixsd via the current guix-install.sh script 
on an arm--beaglebone black--i attempted to create an image using the 
string from Mathieu Othacehe's Porting GuixDS to ARMv7, December 22, 
2017. Namely:

# guix system disk-image --system=armhf-linux -e "(@ (gnu system 
install) beaglebone-black-installation-os)"

it ended with the following:

Guix System: Error: fails to connect to '/var/guix/daemon-socket/socket' 
no such file or directory

* * *

any thoughts as to why the error occured and what i need to do for it to 
complete without error?