Seems like a second exception raised in the process of raising an exception :-). The original crash reason is unkown, the network was operating normally. downloading from http://127.0.0.1:8080/nar/gzip/8sdx7qyb4l3ni6yy902jlhamb26lqb6f-spice-gtk-0.37 ... 0.0 http://127.0.0.1:8080/nar/gzip/954b3kw59mdvanp33yx93q5pzzll4wg9-qemu-5.0.0 - 29605888 qemu-5.0.0 1.6MiB/s 00:26 | 41.8MiB transferredBacktrace: In ice-9/boot-9.scm: 1731:15 19 (with-exception-handler # _ # _ # …) In guix/scripts/package.scm: 966:10 18 (_) In guix/status.scm: 776:4 17 (call-with-status-report _ _) In guix/store.scm: 1300:8 16 (call-with-build-handler _ _) 1300:8 15 (call-with-build-handler # …) In guix/scripts/package.scm: 889:2 14 (_) In guix/build/syscalls.scm: 1167:4 13 (call-with-file-lock/no-wait _ _ _) In guix/scripts/package.scm: 143:19 12 (build-and-use-profile # "/var/guix/profiles/per-u…" …) In guix/store.scm: 2042:24 11 (run-with-store # _ #:guile-for-build _ #:system _ # …) In guix/profiles.scm: 1586:2 10 (_ _) 348:2 9 (_ _) In guix/store.scm: 1924:12 8 (_ #) 1357:5 7 (map/accumulate-builds # _ _) 1368:15 6 (_ # _ _) 740:13 5 (process-stderr _ _) In unknown file: 4 (display "@ substituter-succeeded /gnu/store/277yzwcx6fshsxlqnwvyv94q66miv3ii-diffoscope…" …) In guix/status.scm: 699:16 3 (write! _ _ _) 613:6 2 (_ (download-progress "/gnu/store/954b3kw59mdvanp33yx93q5pzzll4wg9-qemu-5.0.0" "http:…" …) …) In guix/progress.scm: 213:14 1 (display-download-progress "qem@" _ #:start-time _ #:transferred _ #:log-port _) In ice-9/boot-9.scm: 1669:16 0 (raise-exception _ #:continuable? _) ice-9/boot-9.scm:1669:16: In procedure raise-exception: In procedure =: Wrong type argument in position 1: #f Maxim