Not sure what the right solution to this mess is; ideally a user would just have to install a set of gstreamer plugins and those would work across all of their applications, and you wouldn't have to specify the plugins for each gst-using app. Dunno. For now this works better than not being able to play mp3s tho :P
Andy
>From d73e56bbb687eb42a7449aca37c807afdbf2cbaf Mon Sep 17 00:00:00 2001 From: Andy Wingo <wi...@igalia.com> Date: Fri, 21 Aug 2015 16:49:31 +0200 Subject: [PATCH] gnu: rhythmbox: Add gst-plugins-ugly dep. * gnu/packages/gnome.scm (rhythmbox): Depend on gst-plugins-ugly so that we can play mp3 files. --- gnu/packages/gnome.scm | 1 + 1 file changed, 1 insertion(+) diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm index b97c9ff..433a37a 100644 --- a/gnu/packages/gnome.scm +++ b/gnu/packages/gnome.scm @@ -3007,6 +3007,7 @@ which can read a large number of file formats.") ("gstreamer" ,gstreamer) ("gst-plugins-base" ,gst-plugins-base) ("gst-plugins-good" ,gst-plugins-good) + ("gst-plugins-ugly" ,gst-plugins-ugly) ("totem-pl-parser" ,totem-pl-parser) ("libgudev" ,libgudev) ;;("libmtp" ,libmtp) FIXME: Not detected -- 2.4.3