I get the following output when running `guix weather icecat` on 
aarch64-linux with Guix:

$ guix describe
Generation 1	Jun 28 2021 01:11:59	(current)
   guix 364b561
     repository URL: https://git.savannah.gnu.org/git/guix.git
     branch: master
     commit: 364b56124b88398c199aacbfd4fdfc9a1583e634

$ guix weather icecat
computing 0 package derivations for aarch64-linux...
looking for 0 store items on https://ci.guix.gnu.org...
https://ci.guix.gnu.org
Backtrace:
            7 (primitive-load "/home/jackhill/.config/guix/current/bi…")
In guix/ui.scm:
   2147:12  6 (run-guix-command _ . _)
In ice-9/boot-9.scm:
   1752:10  5 (with-exception-handler _ _ #:unwind? _ # _)
In guix/scripts/weather.scm:
     577:9  4 (_)
In guix/build/utils.scm:
    569:23  3 (every* #<procedure d88f240 at guix/scripts/weather.sc…> …)
In guix/scripts/weather.scm:
    579:21  2 (_ "https://ci.guix.gnu.org")
    212:22  1 (_ _ () 0)
In ice-9/boot-9.scm:
   1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Throw to key `numerical-overflow' with args `("/" "Numerical overflow" #f 
#f)'.

Best,
Jack