$ guix pull
guile: warning: failed to install locale
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	80ee7c4
substitute: updating substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
The following derivations will be built:
   /gnu/store/jj7ilj6bkaxypicc7grfp2h9q38hsz0b-module-import-compiled.drv
   /gnu/store/biac3z882laql46smaaq15yqjim3w8vm-module-import.drv
   /gnu/store/3fmhv2g7n1qis98qwgkcbha2f0fvnqac-compute-guix-derivation.drv
building /gnu/store/biac3z882laql46smaaq15yqjim3w8vm-module-import.drv...
successfully built /gnu/store/biac3z882laql46smaaq15yqjim3w8vm-module-import.drv
building /gnu/store/jj7ilj6bkaxypicc7grfp2h9q38hsz0b-module-import-compiled.drv...
successfully built /gnu/store/jj7ilj6bkaxypicc7grfp2h9q38hsz0b-module-import-compiled.drv
building /gnu/store/3fmhv2g7n1qis98qwgkcbha2f0fvnqac-compute-guix-derivation.drv...
successfully built /gnu/store/3fmhv2g7n1qis98qwgkcbha2f0fvnqac-compute-guix-derivation.drv
Computing Guix derivation for 'x86_64-linux'... /@ substituter-started /gnu/store/5dzq0p9kmf9qdz77i9i76ljv5gqrn5cf-utf8proc-2.1.1 /gnu/store/lqkyzawj6z3fswbj87nzyg97xkhpiwys-guix-0.15.0/libexec/guix/substitute
Downloading https://mirror.hydra.gnu.org/guix/nar/gzip/5dzq0p9kmf9qdz77i9i76ljv5gqrn5cf-utf8proc-2.1.1...
-following redirection to `https://ci.guix.gnu.org'...
Backtrace:
           3 (apply-smob/1 #<catch-closure 1d70220>)
In ice-9/boot-9.scm:
    705:2  2 (call-with-prompt _ _ #<procedure default-prompt-handle?>)
In ice-9/eval.scm:
    619:8  1 (_ #(#(#<directory (guile-user) 1e26140>)))
In guix/ui.scm:
  1578:12  0 (run-guix-command _ . _)

guix/ui.scm:1578:12: In procedure run-guix-command:
In procedure put-string: Wrong type argument in position 1 (expecting open output port): #<closed: string 22ff3f0>
@ substituter-failed /gnu/store/5dzq0p9kmf9qdz77i9i76ljv5gqrn5cf-utf8proc-2.1.1 256 fetching path `/gnu/store/5dzq0p9kmf9qdz77i9i76ljv5gqrn5cf-utf8proc-2.1.1' failed with exit code 1
@ substituter-started /gnu/store/k3fsjph2l6zlq8chyd4vddik61z5c6vb-valgrind-3.15.0 /gnu/store/lqkyzawj6z3fswbj87nzyg97xkhpiwys-guix-0.15.0/libexec/guix/substitute
killing process 1523
Backtrace:
In srfi/srfi-1.scm:
   592:29 19 (map1 _)
   592:29 18 (map1 _)
   592:29 17 (map1 _)
   592:29 16 (map1 _)
   592:29 15 (map1 _)
   592:29 14 (map1 _)
   592:29 13 (map1 _)
   592:17 12 (map1 (("texlive" #<package texlive-tiny@49435 5ce?>) ?))
In ./guix/packages.scm:
   979:16 11 (expand-input _ _ _ _ _)
   936:16 10 (cache! #<weak-table 531/883> #<package texlive-tiny@4?> ?)
  1255:22  9 (thunk)
  1188:25  8 (bag->derivation #<store-connection 256.97 92a79c0> #<?> ?)
In srfi/srfi-1.scm:
   592:29  7 (map1 _)
   592:29  6 (map1 (("texlive-bin" #<package texlive-bin@201804?>) ?))
   592:17  5 (map1 (("texlive-dvips" #<package texlive-dvips@49?>) ?))
In ./guix/packages.scm:
   979:16  4 (expand-input #<store-connection 256.97 92a79c0> #<pac?> ?)
   936:16  3 (cache! #<weak-table 531/883> #<package texlive-dvips@?> ?)
  1255:22  2 (thunk)
  1188:25  1 (bag->derivation #<store-connection 256.97 92a79c0> #<?> ?)
In srfi/srfi-1.scm:
   592:17  0 (map1 (("dvips-font-maps" #<origin #<<svn-referenc?>) ?))

srfi/srfi-1.scm:592:17: In procedure map1:
Throw to key `srfi-34' with args `(#<condition &store-protocol-error [message: "some substitutes for the outputs of derivation `/gnu/store/kbgb2nk9v8d8dwai6m7bmshcz7mi1sy9-utf8proc-2.1.1.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1] 601f930>)'.
guix pull: error: You found a bug: the program '/gnu/store/2nh946nh4vnm63d7m7jwy3dcqpb7ywja-compute-guix-derivation'
failed to compute the derivation for Guix (version: "80ee7c4a48cdab4afa4d8eb4b7b8873d47841830"; system: "x86_64-linux";
host version: "c6de5afe5c5da34513ea43b041fead30f28f57d4"; pull-version: 1).