How do I access cl-* system packages in sbcl + emacs + slime/sly?

[Kurt I]

Hello all,

I see in guix that there are packages for what also is a (ql:quickload) 
call for me when I'm writing lisp. For instance, I installed cl-csv as a 
system package for guix but I was not able to access it in my emacs + 
slime buffers

What am I missing or not doing correctly?

Thank you, Kurt