GNU Guile 3.0.9
Copyright (C) 1995-2023 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
While compiling expression:
ERROR:
  1. &formatted-message:
      format: "invalid value ~s for field '~a'\n"
      arguments: (%unset-marker% hostname)
  2. &configuration-error
  3. &error-location: #<<location> file: "gnu/services/configuration.scm" line: 218 column: 27>
scheme@(guix-user)>