$ guix pull
Updating channel 'nonguix' from Git repository at 'https://gitlab.com/nonguix/nonguix'...
Authenticating channel 'nonguix', commits 897c1a4 to e4459f4 (8 new commits)...
Updating channel 'guix' from Git repository at 'https://mirror.nju.edu.cn/git/guix.git/'...
Authenticating channel 'guix', commits 9edb3f6 to 5f5d84b (1,287 new commits)...
guix pull: warning: pulled channel 'guix' from a mirror of https://git.savannah.gnu.org/git/guix.git, which might be stale
Building from these channels:
  nonguix   https://gitlab.com/nonguix/nonguix  e4459f4
  guix      https://mirror.nju.edu.cn/git/guix.git/     5f5d84b
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
 module-import-compiled  1.6MiB                                              6.6MiB/s 00:00 ▕██████████████████▏ 100.0%
guix substitute: warning: while fetching https://mirror.sjtu.edu.cn/guix/nar/lzip/ksl5fz19l3h1l9g77yzmrwxmlpkkm5fc-module-import-compiled: server is somewhat slow
guix substitute: warning: try `--no-substitutes' if the problem persists
 module-import-compiled  1.6MiB                                                5KiB/s 05:38 ▕██████████████████▏ 100.0%
building /gnu/store/fjagz1p1kgsq3yx3gnnmisi88mlq410q-module-import.drv...
building /gnu/store/kwk3mfc2hf9g76yi8dq5i1qpsp8m2y4c-module-import.drv...
building /gnu/store/b6a466sqzzz7vr7f3ph1vlh2190faap3-compute-guix-derivation.drv...
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
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substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
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|substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
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substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
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substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
substitute: updating substitutes from 'https://mirror.sjtu.edu.cn/guix/'... 100.0%
 graphviz-minimal-7.0.1-doc  971KiB                                         13.0MiB/s 00:00 ▕██████████████████▏ 100.0%
 fontconfig-minimal-2.14.0  153KiB                                           512KiB/s 00:00 ▕██████████████████▏ 100.0%
 glib-2.82.1  3.5MiB                                                           9KiB/s 06:17 ▕██████████████████▏ 100.0%
 guix-daemon-1.4.0-36.0772d36  266KiB                                      270.9MiB/s 00:00 ▕██████████████████▏ 100.0%
 gts-0.7.6  273KiB                                                             504B/s 09:15 ▕██████████████████▏ 100.0%
 libevent-2.1.12  301KiB                                                     1.6MiB/s 00:00 ▕██████████████████▏ 100.0%
 libgit2-1.9.0  713KiB                                                         3KiB/s 04:18 ▕██████████████████▏ 100.0%
 libjpeg-turbo-2.1.4  366KiB                                               330.4MiB/s 00:00 ▕██████████████████▏ 100.0%
 guile-git-0.10.0  482KiB                                                  525.3MiB/s 00:00 ▕██▍               ▏  13.3%retrying download of '/gnu/store/28swdpaiwq27ak5mz9lg4334627670x7-guile-git-0.10.0' with other substitute URLs...
 guile-git-0.10.0  482KiB                                                   1.09GiB/s 00:00 ▕██▍               ▏  13./Backtrace:
          17 (primitive-load "/gnu/store/kh9p56sx9p6q3pfaa28208g32aqinfm8-compute-guix-derivation")
In ice-9/eval.scm:
    155:9 16 (_ _)
    159:9 15 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ice-9/boot-9.scm:
    152:2 14 (with-fluid* _ _ _)
    152:2 13 (with-fluid* _ _ _)
In guix/store.scm:
  2212:24 12 (run-with-store #<store-connection 256.99 7b3d245840a0> #<procedure 7b3d038f6af0 at guix/self.scm:1388?> ?)
   2040:8 11 (_ #<store-connection 256.99 7b3d245840a0>)
In guix/gexp.scm:
   300:22 10 (_ #<store-connection 256.99 7b3d245840a0>)
   1231:2  9 (_ #<store-connection 256.99 7b3d245840a0>)
   1098:2  8 (_ #<store-connection 256.99 7b3d245840a0>)
    939:4  7 (_ #<store-connection 256.99 7b3d245840a0>)
In guix/store.scm:
  2097:12  6 (_ #<store-connection 256.99 7b3d245840a0>)
   1434:5  5 (map/accumulate-builds #<store-connection 256.99 7b3d245840a0> #<procedure 7b3d08c2ba60 at guix/store.?> ?)
  1450:15  4 (_ #<store-connection 256.99 7b3d245840a0> ("/gnu/store/j74bbxaq94gjmxz0wjhzknnpyr7fp3dd-guix-daemo?" ?) ?)
  1450:15  3 (loop #f)
   747:11  2 (process-stderr #<store-connection 256.99 7b3d245840a0> _)
In guix/serialization.scm:
   101:11  1 (read-int #<input-output: file 10>)
     79:6  0 (get-bytevector-n* #<input-output: file 10> 8)
guix/serialization.scm:79:6: In procedure get-bytevector-n*:
ERROR:
  1. &nar-error:
      file: #f
      port: #<input-output: file 10>
guix pull: error: You found a bug: the program '/gnu/store/kh9p56sx9p6q3pfaa28208g32aqinfm8-compute-guix-derivation'
failed to compute the derivation for Guix (version: "5f5d84beccc180f1b51474c0e47eb6e0d0c9175f"; system: "x86_64-linux";
host version: "1.4.0-36.0772d36"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.