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diff --git a/doc/guix.texi b/doc/guix.texi
index 71167dfdc7..119c2d9c98 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4211,6 +4211,11 @@ guix environment --ad-hoc guile guile-sdl -E guile
runs @command{guile} in an environment where Guile and Guile-SDL are
available.
+Note that this example implicitly asks for the default output of
+@code{guile} and @code{guile-sdl} but it is possible to ask for a
+specific output---e.g., @code{glib:bin} asks for the @code{bin} output
+of @code{glib} (@pxref{Packages with Multiple Outputs}).
+
@item --pure
Unset existing environment variables when building the new environment.
This has the effect of creating an environment in which search paths