Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git	2b9b4b1
Computing Guix derivation for 'x86_64-linux'...  -\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\substitute: 
|/substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...   0.0%
-\substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  16.7%
|/substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  33.3%
-\substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  50.0%
|/substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  66.7%
-\substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  83.3%
substitute: updating substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
|/substitute: 
-\substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...   0.0%
|/substitute: updating substitutes from 'https://mirror.hydra.gnu.org'...  50.0%
substitute: updating substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
@ substituter-started /gnu/store/3lnragyxrv7vzzsnpqi7np8yd46xxqik-libxslt-1.1.32 /gnu/store/lqkyzawj6z3fswbj87nzyg97xkhpiwys-guix-0.15.0/libexec/guix/substitute
-Downloading https://mirror.hydra.gnu.org/guix/nar/gzip/3lnragyxrv7vzzsnpqi7np8yd46xxqik-libxslt-1.1.32...
\|/-\|guix substitute: error: download from 'https://mirror.hydra.gnu.org/guix/nar/gzip/3lnragyxrv7vzzsnpqi7np8yd46xxqik-libxslt-1.1.32' failed: 504, "Gateway Time-out"
@ substituter-failed /gnu/store/3lnragyxrv7vzzsnpqi7np8yd46xxqik-libxslt-1.1.32 256 fetching path `/gnu/store/3lnragyxrv7vzzsnpqi7np8yd46xxqik-libxslt-1.1.32' failed with exit code 1
Backtrace:
          18 (primitive-load "/gnu/store/12x6qgb107f3s9vj6w76z9419qc…")
In ice-9/eval.scm:
    155:9 17 (_ _)
    159:9 16 (_ #(#(#(#(#(#(#(#(#(#(#(…) …) …) …) …) …) …) …) …) …) …))
In guix/store.scm:
  1605:24 15 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/gexp.scm:
    701:2 14 (_ _)
In guix/monads.scm:
    485:9 13 (_ _)
In guix/gexp.scm:
   567:22 12 (_ _)
    701:2 11 (_ _)
In guix/monads.scm:
    485:9 10 (_ _)
In guix/gexp.scm:
   567:22  9 (_ _)
    701:2  8 (_ _)
In guix/monads.scm:
    485:9  7 (_ _)
In guix/gexp.scm:
   567:22  6 (_ _)
In guix/store.scm:
  1501:38  5 (_ #<build-daemon 256.97 1442eb0>)
In guix/packages.scm:
   881:14  4 (cache! #<weak-table 460/883> #<package guile-gcrypt@0…> …)
In unknown file:
           3 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1205:22  2 (thunk)
  1138:25  1 (bag->derivation #<build-daemon 256.97 1442eb0> #<<bag…> …)
In srfi/srfi-1.scm:
   592:17  0 (map1 (("source" #<origin #<<git-reference> url: "…>) …))

srfi/srfi-1.scm:592:17: In procedure map1:
Throw to key `srfi-34' with args `(#<condition &nix-protocol-error [message: "some substitutes for the outputs of derivation `/gnu/store/3kf7amwj0jm1al5b47nzavqzxvrkgj82-asciidoc-8.6.10.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1] 54da4b0>)'.
guix pull: error: You found a bug: the program '/gnu/store/12x6qgb107f3s9vj6w76z9419qcdc9b5-compute-guix-derivation'
failed to compute the derivation for Guix (version: "2b9b4b1fe368fb1745c4150adbb8754948326c95"; system: "x86_64-linux";
host version: "6f00fb75ca52ae112a73f2fbc6d8f6269a8db5f6"; pull-version: 1).
Please report it by email to <bug-guix@gnu.org>.