In a 'guix system vm-image' VM produced using Guix from Git
v0.15.0-3097-gc16913d34 I have ...

g1@sysi53 ~$ guix --version
guix (GNU Guix) 0.15.0-6.f9a8fce

... and when I try to install a package, e.g., ...

g1@sysi53 ~$ guix package -i emacs-no-x

... I get ...

building /gnu/store/phy1nbsmlml06lkjixjw2dfb4k6wi5al-python-3.6.5.drv...
-Killed

... details and vm-image config, attached.

TIA - George