Hi all,
Currently, quodlibet is unable to find a gstreamer audio sink when playing audio unless the relevant gst-plugins is explicitly installed in your profile. For me that's gst-plugins-good. Currently, existing packaged applications such as Strawberry and Clementine explicitly set the GST_PLUGIN_SYSTEM_PATH. I've adapted this for Quodlibet with my patch. I suppose an alternative might be to include the gst plugins as propagated-inputs but I'm not certain about that. I decided to just follow the current practice.
Hope everything is right here. My first patch to guix.
Cheers,
Bassam
0001-gnu-quodlibet-Set-GST_PLUGIN_SYSTEM_PATH.patch