Here's another error! For *this* instance notice the very slow download speed; other downloads got up to 2MiB/s. If my understanding is correct the SJTUG server is effectively a caching proxy, meaning that the low download speed here probably means that the SJTUG server itself is downloading from the Berlin Cuirass. As noted before, often an issue with using ci.guix.gnu.org is that for large multi-megabyte substitutes sometimes the Berlin server will just disconnect and EOF early, so I suspect something similar is happening to the SJTUG server. ``` downloading from https://mirror.sjtu.edu.cn/guix/nar/lzip/6fa3h0n957hr2nbd05ygjnk4idjq122q-ffmpeg-4.3.2 ... ffmpeg-4.3.2 8.8MiB 13KiB/s 05:05 [####### ] 44.2% Backtrace: In guix/store/deduplication.scm: 227:2 19 (dump-file/deduplicate "/gnu/store/6fa3h0n957hr2nbd05y…" …) In ice-9/ports.scm: 463:17 18 (call-with-output-file _ _ #:binary _ #:encoding _) In guix/store/deduplication.scm: 232:10 17 (_ _) In guix/serialization.scm: 261:6 16 (dump _) 247:20 15 (dump # # …) In unknown file: 14 (get-bytevector-n! # # 0 #) In guix/store/deduplication.scm: 203:22 13 (read! #vu8(85 110 107 110 111 119 110 32 112 105 99 …) …) In unknown file: 12 (get-bytevector-n! # # 0 #) In gcrypt/hash.scm: 223:13 11 (read! #vu8(85 110 107 110 111 119 110 32 112 105 99 …) …) In unknown file: 10 (get-bytevector-n! # # 0 #) In lzlib.scm: 501:4 9 (lzread! # # …) In unknown file: 8 (get-bytevector-n # 65537) In guix/progress.scm: 358:30 7 (read! _ _ _) In unknown file: 6 (get-bytevector-n! # # 0 #) In web/response.scm: 95:2 5 (read! _ _ _) In ice-9/boot-9.scm: 1669:16 4 (raise-exception _ #:continuable? _) 1669:16 3 (raise-exception _ #:continuable? _) 1764:13 2 (_ #<&compound-exception components: (#<&error> #<&irri…>) 1669:16 1 (raise-exception _ #:continuable? _) 1669:16 0 (raise-exception _ #:continuable? _) ice-9/boot-9.scm:1669:16: In procedure raise-exception: Throw to key `bad-response' with args `("EOF while reading response body: ~a bytes of ~a" (4112173 9196598))'. Backtrace: In ice-9/boot-9.scm: 1736:10 4 (with-exception-handler _ _ #:unwind? _ # _) In unknown file: 3 (apply-smob/0 #) In ice-9/boot-9.scm: 718:2 2 (call-with-prompt _ _ #) In ice-9/eval.scm: 619:8 1 (_ #(#(#))) In guix/ui.scm: 2164:12 0 (run-guix-command _ . _) guix/ui.scm:2164:12: In procedure run-guix-command: Throw to key `bad-response' with args `("EOF while reading response body: ~a bytes of ~a" (4112173 9196598))'. substitution of /gnu/store/6fa3h0n957hr2nbd05ygjnk4idjq122q-ffmpeg-4.3.2 failed guix upgrade: error: some substitutes for the outputs of derivation `/gnu/store/9xx9kbbjals2y7llhak65fnnyfh9rkyq-gnome-tweaks-3.34.1.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source ``` Thanks raid5atemyhomework