I think the reason is that server is off-line, cause after `guix pull` has given me an error I run `guix pull --substitute-urls="http://berlin.guixsd.org <http://berlin.guixsd.org>"` that goes normally.


# guix pull
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    ad8a4a6
Computing Guix derivation for 'x86_64-linux'... -@ substituter-started /gnu/store/9acqfn7g6nfgvcrzkq84dlc69ps8b2vg-git-2.19.2.tar.xz /gnu/store/j1n8dv2qrgjyh58fq2vm6h870isi3wdv-guix-0.15.0-8.71a78ba/libexec/guix/substitute
/guix substitute: error: connect: Connection timed out
@ substituter-failed /gnu/store/9acqfn7g6nfgvcrzkq84dlc69ps8b2vg-git-2.19.2.tar.xz 256 fetching path `/gnu/store/9acqfn7g6nfgvcrzkq84dlc69ps8b2vg-git-2.19.2.tar.xz' failed with exit code 1
Backtrace:
In guix/store.scm:
  1659:24 19 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
   1532:8 18 (_ _)
In guix/gexp.scm:
    707:2 17 (_ _)
In guix/monads.scm:
    485:9 16 (_ _)
In guix/gexp.scm:
   572:22 15 (_ _)
In guix/store.scm:
   1532:8 14 (_ _)
In guix/gexp.scm:
    707:2 13 (_ _)
In guix/monads.scm:
    485:9 12 (_ _)
In guix/gexp.scm:
   572:22 11 (_ _)
In guix/store.scm:
   1532:8 10 (_ _)
In guix/gexp.scm:
    707:2  9 (_ _)
In guix/monads.scm:
    485:9  8 (_ _)
In guix/gexp.scm:
   572:22  7 (_ _)
In guix/store.scm:
   1532:8  6 (_ _)
  1555:38  5 (_ #<build-daemon 256.99 a459d20>)
In guix/packages.scm:
   881:14  4 (cache! #<weak-table 417/883> #<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 256.99 a459d20> #<<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/c1mzmfkmxcimgyq0322bx3044qi1llqi-git-2.19.2.tar.xz.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1] 780b240>)'.
guix pull: error: You found a bug: the program '/gnu/store/vqcllnsq3k391mihacrzz3bp1ashdinx-compute-guix-derivation'
failed to compute the derivation for Guix (version: "ad8a4a666d1012f1ace44fc55d35e8f87a0c8cf9"; system: "x86_64-linux";
host version: "7a1d25c400c6271363096669b6d969565bebfd70"; pull-version: 1).
Please report it by email to <bug-guix@gnu.org>.