If running this program produces errors similar to
Couldn't recognize the image file format for file '.../Devel-MAT-UI/icons/refs-All.svg' at .../App/Devel/MAT/Explorer/GTK/Resources.pm line 61.
this is likely because gdk-pixbuf does not have an image loader for the SVG format. This is probably fixed by installing librsvg2, for example
$ apt-get install librsvg2-2 $ pkg install librsvg2 etc...