I've seen this a few times, and it seems like guix pull remembers old
substitutes. I tried disabling one of the substitutes that guix-daemon
is configured to use since it wasn't online at the time, but it tries to
use it anyways:

guix pull --substitute-urls='http://10.0.0.15:8081 http://10.0.0.15:8082' --branch=elfutils-0.172 --url=/home/vagrant/src/guix-bare

guile: warning: failed to install locale
warning: failed to install locale: Invalid argument
Updating from Git repository at '/home/vagrant/src/guix-bare'...
Building from Git commit b606d8625660ed035e98db7035f487e8b90b4d65...
guile: warning: failed to install locale
Computing Guix derivation for 'aarch64-linux'... -fetching path `/gnu/store/d1im1cqpajfyl6w205vpmw7pqv2j1y1b-libpthread-stubs-0.4'...
-
|Downloading http://10.0.0.157:8080/nar/gzip/d1im1cqpajfyl6w205vpmw7pqv2j1y1b-libpthread-stubs-0.4...
guix substitute: error: connect: No route to host
fetching path `/gnu/store/d1im1cqpajfyl6w205vpmw7pqv2j1y1b-libpthread-stubs-0.4' failed with exit code 1
fetching path `/gnu/store/yalicl04jvm63lwsnck336w96g88bi80-bash-4.4.19'...
killing process 860
Backtrace:
          17 (primitive-load "/gnu/store/xv6vjm9rz14c6y7ysr8rlqd6qaj?")
In ice-9/boot-9.scm:
    142:2 16 (dynamic-wind _ _ #<procedure 1fd1b960 at ice-9/eval.sc?>)
In ice-9/eval.scm:
    155:9 15 (_ _)
    159:9 14 (_ #(#(#<directory (guile-user) 1f85b140> "aarch64-?" ?)))
In ./guix/store.scm:
  1414:24 13 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In ./guix/gexp.scm:
/    666:2 12 (_ _)
In ./guix/monads.scm:
    485:9 11 (_ _)
In ./guix/gexp.scm:
   538:22 10 (_ _)
    666:2  9 (_ _)
In ./guix/monads.scm:
    485:9  8 (_ _)
In ./guix/gexp.scm:
   538:22  7 (_ _)
In ./guix/store.scm:
  1333:38  6 (_ #<build-daemon 256.97 1f91ecd0>)
In ./guix/packages.scm:
   878:14  5 (cache! #<weak-table 490/883> #<package graphviz@2.40.?> ?)
In unknown file:
           4 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In ./guix/grafts.scm:
    310:4  3 (graft-derivation #<build-daemon 256.97 1f91ecd0> #<de?> ?)
    188:4  2 (references-oracle #<build-daemon 256.97 1f91ecd0> #<de?>)
   197:20  1 (_ _ _)
In ./guix/store.scm:
   934:15  0 (_ #<build-daemon 256.97 1f91ecd0> _ _)

./guix/store.scm:934:15: Throw to key `srfi-34' with args `(#<condition &nix-protocol-error [message: "some substitutes for the outputs of derivation `/gnu/store/jvfkbsw0fgi1ihnc8g2dhixgsy1gzk9b-libpthread-stubs-0.4.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1] 262abb10>)'.
Backtrace:
           9 (primitive-load "/gnu/store/xl7cb97kpmpwc49yd9s6hhk21d8?")
In guix/ui.scm:
  1557:12  8 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    837:9  7 (catch _ _ #<procedure ffffb23ef980 at guix/ui.scm:593?> ?)
    837:9  6 (catch _ _ #<procedure ffffb23ef998 at guix/ui.scm:711?> ?)
    837:9  5 (catch _ _ #<procedure ffffb02ac7a0 at guix/scripts/pu?> ?)
In guix/scripts/pull.scm:
   391:22  4 (_)
In guix/store.scm:
  1414:24  3 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/scripts/pull.scm:
    239:2  2 (_ _)
In ice-9/eval.scm:
   191:27  1 (_ #(#(#<directory (build-self) ae28dc0> #<procedu?>) ?))
In unknown file:
           0 (scm-error misc-error #f "~A ~S" ("invalid build re?" ?) ?)

ERROR: In procedure scm-error:
ERROR: invalid build result (#<derivation /gnu/store/015sq2sm50yv22x4n5pcvr0psy51pfvr-compute-guix-derivation.drv => /gnu/store/xv6vjm9rz14c6y7ysr8rlqd6qaj3w8v3-compute-guix-derivation bdb4230> "")



live well,
  vagrant