Problem loading numpy and other on a venv in a guix system

[mprodrigues@posteo.net]

Hello,

I've been using a guix shell with a couple of python packages and it 
works fine,
however I'd also like to keep the option of using a virtualenv if 
possible, the
thing is I'm having problem running modules like numpy, that depend on 
non
python dependencies. The error I get when I try to load numpy in a venv 
is:

Importing the numpy C-extensions failed. This error can happen for many 
reasons,
often due to issues with your setup or how NumPy was installed.

and in the end:

Original error was: libz.so.1: cannot open shared object file: No such 
file or
directory

I have tried installing zlib directly, also tried to add my default 
profile libs
path to the venv PATH, but to no avail until now.  How can I solve this? 
Or
maybe someone can point me in the direction that I have to take to 
properly
debug this.

Best regards,
Mateus Rodrigues