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@@ -15353,6 +15353,14 @@ The TCP port to listen for connections.
 The host (and thus, network interface) to listen to.  Use
 @code{"0.0.0.0"} to listen on all the network interfaces.
 
+@item @code{advertise?} (default: @code{#f})
+When true, advertise the service on the local network @i{via} the DNS-SD
+protocol, using Avahi.
+
+This allows neighboring Guix devices with discovery on (see
+@code{guix-configuration} above) to discover this @command{guix publish}
+instance and to automatically download substitutes from it.
+
 @item @code{compression} (default: @code{'(("gzip" 3))})
 This is a list of compression method/level tuple used when compressing
 substitutes.  For example, to compress all substitutes with @emph{both} lzip