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diff --git a/doc/guix.texi b/doc/guix.texi
index 054d0af467..79aa71a993 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -540,6 +540,11 @@ multiple-output package.
@itemx -r @var{package}
Remove @var{package}.
+As for @code{--install}, @var{package} may specify a version number
+and/or output name in addition to the package name. For instance,
+@code{-r glibc:debug} would remove the @code{debug} output of
+@code{glibc}.
+
@item --upgrade[=@var{regexp}]
@itemx -u [@var{regexp}]
Upgrade all the installed packages. When @var{regexp} is specified, upgrade