---
name: "guix-challenge"
section: "1"
platform: "linux"
package: "guix"
version: "1.2.0-4+deb11u2"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/guix-challenge"
---

# guix-challenge(1)

manual page for guix challenge (GNU Guix) 1.0.1.21935-f5bec3

## NAME

guix challenge (GNU Guix) - manual page for guix challenge (GNU Guix) 1.0.1.21935-f5bec3

## SYNOPSIS

**guix** *challenge* \[*PACKAGE*...\]

## DESCRIPTION

Challenge the substitutes for PACKAGE... provided by one or more servers.

- **--substitute-urls**=*URLS*

  compare build results with those at URLS

- **-v**, **--verbose**

  show details about successful comparisons

- **--diff**=*MODE*

  show differences according to MODE

- **-h**, **--help**

  display this help and exit

- **-V**, **--version**

  display version information and exit

## REPORTING BUGS

Report bugs to: bug-guix@gnu.org.\
 GNU Guix home page: \<https://www.gnu.org/software/guix/\>\
 General help using Guix and GNU software: \<https://guix.gnu.org/help/\>

## COPYRIGHT

Copyright © 2020 the Guix authors License GPLv3+: GNU GPL version 3 or later \<http://gnu.org/licenses/gpl.html\>\
 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

## SEE ALSO

The full documentation for **guix challenge (GNU Guix)** is maintained as a Texinfo manual.  If the **info** and **guix challenge (GNU Guix)** programs are properly installed at your site, the command

-

  **info guix**

should give you access to the complete manual.