$ guix package -i guile-git && guix pull; echo 'GUILE_LOAD_PATH' /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms; echo 'GUILE_LOAD_COMPILED_PATH' /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache; echo 'guix system reconfigure'; guix system reconfigure /etc/config.scm; echo 'file /store/r4scrqkcci0rvc7sqs5zq77cnlpixqdi-nettle-2.7.1.drv'; file /gnu/store/r4scrqkcci0rvc7sqs5zq77cnlpixqdi-nettle-2.7.1.drv
The following package will be upgraded:
   guile-git	0.0-3.e156a10 → 0.0-3.e156a10	/gnu/store/9jbw2m2ixkiixbkkfyd2mf46j7d0p5fk-guile-git-0.0-3.e156a10

nothing to be done
guix pull: error: Guile-Git is missing but it is now required by 'guix pull'.
Install it by running:

  guix package -i guile-git
  export GUILE_LOAD_PATH=$HOME/.guix-profile/share/guile/site/2.2:$GUILE_LOAD_PATH
  export GUILE_LOAD_COMPILED_PATH=$HOME/.guix-profile/lib/guile/2.2/site-ccache:$GUILE_LOAD_COMPILED_PATH

GUILE_LOAD_PATH /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms /home/thomas/.guix-profile/share/guile/site/2.2 /home/thomas/guixsd/modules/tms
GUILE_LOAD_COMPILED_PATH /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache /home/thomas/.guix-profile/lib/guile/2.2/site-ccache
guix system reconfigure
Backtrace:
In guix/store.scm:
  1444:24 19 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/scripts/system.scm:
    705:2 18 (_ _)
In gnu/services.scm:
    304:2 17 (_ _)
In guix/monads.scm:
    485:9 16 (_ _)
In gnu/services.scm:
    572:2 15 (_ _)
In guix/profiles.scm:
   1229:2 14 (_ _)
In guix/store.scm:
   1349:0 13 (_ _)
In guix/profiles.scm:
   257:16 12 (_ _)
    238:8 11 (_ _)
In guix/store.scm:
  1363:38 10 (_ #<build-daemon 256.97 4136eb0>)
In guix/packages.scm:
   833:14  9 (cache! #<weak-table 625/883> #<package lsh@2.1 gnu/pa…> …)
In unknown file:
           8 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/grafts.scm:
    312:2  7 (graft-derivation _ #<derivation /gnu/store/9ldhpw9a9a…> …)
   272:35  6 (_ #<vlist ()>)
In guix/monads.scm:
   471:14  5 (mapm _ ())
In guix/grafts.scm:
   256:31  4 (dependency-grafts _)
   159:16  3 (item->deriver _ "/gnu/store/1kwp4zbjpkghsy2jqxgviazvc5…")
In guix/derivations.scm:
   493:17  2 (read-derivation-from-file "/gnu/store/r4scrqkcci0rvc7s…")
In ice-9/ports.scm:
   444:17  1 (call-with-input-file _ _ #:binary _ #:encoding _ # _)
In unknown file:
           0 (scm-error misc-error #f "~A ~S ~S" ("failed to par…" …) …)

ERROR: In procedure scm-error:
ERROR: failed to parse derivation #<input: /gnu/store/r4scrqkcci0rvc7sqs5zq77cnlpixqdi-nettle-2.7.1.drv 15> ()
file /store/r4scrqkcci0rvc7sqs5zq77cnlpixqdi-nettle-2.7.1.drv
/gnu/store/r4scrqkcci0rvc7sqs5zq77cnlpixqdi-nettle-2.7.1.drv: empty