alan@gort:~/Development/Snappy/test-gst-clutter$ snap install test-gst-clutter_master_amd64.snap --dangerous
test-gst-clutter master installed
alan@gort:~/Development/Snappy/test-gst-clutter$ test-gst-clutter 
Gtk-Message: Failed to load module "canberra-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information

(test-gst-clutter:7634): Clutter-Gst-CRITICAL **: Unable to create playbin element
**
Clutter-Gst:ERROR:./clutter-gst-playback.c:2018:clutter_gst_playback_init: assertion failed: (priv->pipeline != NULL)
Aborted (core dumped)