Pjotr, I've added your tip to the cookbook.

>   env -i /bin/bash --login --noprofile --norc
>
>   . ~/opt/my-tools-profile/etc/profile

Note that I've replaced /bin/bash with $(which bash) since /bin/bash
does not exist on Guix System ;)

Thanks for sharing!

Cheers!

-- 
Pierre Neidhardt
https://ambrevar.xyz/