emacs-guix and build-farm

[白い熊]

Hello all:

I was intrigued by the B keybinding in emacs-guix which when displaying 
the list of all packages should enable you to see the list of all built 
versions available via substitutes, if I understand it correctly. This 
came to my ming after doing a guix pull then trying to install 
libreoffice which started to build for ages due to unavailable built 
substitute.

However trying to display it in emacs-guix tells you:
guix-assert-build-farm: This feature requires ‘build-farm’ package, 
which is not installed

The only package available though is emacs-build-farm which doesn't 
solve this as Emacs still says build-farm not installed. How can I fix 
this?

--
Best regards / 宜しく御願い致します / S pozdravem / C уважением / Z poważaniem / 
Mit freundlichen Grüßen

白い熊
ShiroiKuma