```
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
 graphviz-2.49.0-doc  2.0MiB                                                                                                                                      2.9MiB/s 00:01 [##################] 100.0%
 bash  455KiB                                                                                                                                                     2.0MiB/s 00:00 [##################] 100.0%
 guile-avahi-0.4.0-1.6d43caf  49KiB                                                                                                                               212KiB/s 00:00 [##################] 100.0%
 guile-git-0.5.2-checkout  87KiB                                                                                                                                  523KiB/s 00:00 [##################] 100.0%
 guile-json-3.5.0  44KiB                                                                                                                                           95KiB/s 00:00 [##################] 100.0%
 guix-1.3.0-26.fd00ac7-checkout  9.1MiB                                                                                                                            53KiB/s 01:23 [########          ]  47.6%Backtrace:
          17 (primitive-load "/gnu/store/mvf0bs4krpmfkblzhjqjfcl670b6s4rf-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:
  2129:24 12 (run-with-store #<store-connection 256.99 160d3d20> #<procedure 25b24a50 at ./guix/self.scm:1292:2 (st?> ?)
   1966:8 11 (_ #<store-connection 256.99 160d3d20>)
In ./guix/gexp.scm:
   300:22 10 (_ #<store-connection 256.99 160d3d20>)
   1181:2  9 (_ #<store-connection 256.99 1db04c80>)
   1047:2  8 (_ #<store-connection 256.99 1db04c80>)
    893:4  7 (_ #<store-connection 256.99 1db04c80>)
In ./guix/store.scm:
  2014:12  6 (_ #<store-connection 256.99 1db04c80>)
   1406:5  5 (map/accumulate-builds #<store-connection 256.99 1db04c80> #<procedure 20a07f00 at ./guix/store.scm:20?> ?)
  1421:15  4 (_ #<store-connection 256.99 1db04c80> ("/gnu/store/s2vym1ry57k3mh0a85m5xdnhm93dycz3-guile-ssh-0.15?" ?) ?)
  1421:15  3 (loop #f)
   733:11  2 (process-stderr #<store-connection 256.99 1db04c80> _)
In ./guix/serialization.scm:
   102:11  1 (read-int #<input-output: file 10>)
     80:6  0 (get-bytevector-n* #<input-output: file 10> 8)

./guix/serialization.scm:80:6: 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/mvf0bs4krpmfkblzhjqjfcl670b6s4rf-compute-guix-derivation'
failed to compute the derivation for Guix (version: "a028eafcc2c6beffcb370296a4c5a90fe34fbcca"; system: "aarch64-linux";
host version: "140bdbc29fe92eb2e571c1641eb1af773665d14b"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.
```
I am sad