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-rw-r--r--doc/guix.texi4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 979288c3be..c5a7de7c3b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4321,7 +4321,9 @@ guix import gem rails
@item cpan
@cindex CPAN
-Import metadata from @uref{https://www.metacpan.org/, MetaCPAN}.
+Import metadata from @uref{https://www.metacpan.org/, MetaCPAN}@footnote{This
+functionality requires Guile-JSON to be installed.
+@xref{Requirements}.}.
Information is taken from the JSON-formatted metadata provided through
@uref{https://api.metacpan.org/, MetaCPAN's API} and includes most
relevant information, such as module dependencies. License information