Newbie: How to see progress during 'build' phase?

[Rodrigo Morales]

I'm downloading and building some heavy packages in Guix. Therefore, the
build phase usually takes more than 10 minutes. During that process, I
see the message a slash character that is rotating and the message
'build' phase. I wish I could see the progress of that phase?

Is it possible to show the progress or at least information of the build
phase? Is there a flag for the guix command that enables this behavior?