[env]$ ./pre-inst-env  guix lint -c cve freecad                         
Backtrace:reecad@0.18.2-1.dbb4cc6 [cve]...
          11 (apply-smob/1 #<catch-closure 1a071a0>)
In ice-9/boot-9.scm:
    705:2 10 (call-with-prompt _ _ #<procedure default-prompt-handle?>)
In ice-9/eval.scm:
    619:8  9 (_ #(#(#<directory (guile-user) 1ac5140>)))
In guix/ui.scm:
  1668:12  8 (run-guix-command _ . _)
In srfi/srfi-1.scm:
    640:9  7 (for-each #<procedure 1df01a0 at guix/scripts/lint.scm?> ?)
In guix/scripts/lint.scm:
   1152:4  6 (run-checkers #<package freecad@0.18.2-1.dbb4cc6 gnu/p?> ?)
In srfi/srfi-1.scm:
    640:9  5 (for-each #<procedure 3e473c0 at guix/scripts/lint.scm?> ?)
In guix/scripts/lint.scm:
    933:4  4 (check-vulnerabilities _)
    928:9  3 (_ _)
In unknown file:
           2 (force #<promise #<procedure 7f1ce3ab6228 at guix/scrip?>)
In guix/scripts/lint.scm:
   917:24  1 (_)
In ice-9/boot-9.scm:
    829:9  0 (catch srfi-34 #<procedure 37e64e0 at guix/scripts/lin?> ?)

ice-9/boot-9.scm:829:9: In procedure catch:
In procedure connect: Connection timed out

There is that procedure "call-with-networking-fail-safe" but it seams
it does not handle connection timeouts correctly.

Björn