Hullo Ivan,

At a glance, this *looks* like what is frequently fixed by adding 
‘-fcommon’ to CFLAGS[0].  Worth a try…

Kind regards,

T G-R

[0]: 
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=ab5d31c53eb06ced0873599a98c74dba80b46b1e