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-rw-r--r--emacs/guix-command.el5
1 files changed, 3 insertions, 2 deletions
diff --git a/emacs/guix-command.el b/emacs/guix-command.el
index 1a42594b68..36ce7bcb09 100644
--- a/emacs/guix-command.el
+++ b/emacs/guix-command.el
@@ -364,8 +364,9 @@ to be modified."
                      :name "-- " :char ?= :option? t args)))
     (let ((command (car commands)))
       (cond
-       ((member command '("archive" "build" "graph" "edit"
-                          "environment" "lint" "refresh"))
+       ((member command
+                '("archive" "build" "challenge" "edit" "environment"
+                  "graph" "lint" "refresh"))
         (argument :doc "Packages" :fun 'guix-read-package-names-string))
        ((string= command "download")
         (argument :doc "URL"))