Mercurial eclass v1.15 (committed today) unpacks to ${S}.
drwxr-xr-x - app-misc
drwxr-xr-x - dev-tex
drwxr-xr-x - dev-util
drwxr-xr-x - licenses
drwxr-xr-x - media-gfx
drwxr-xr-x - media-sound
drwxr-xr-x - profiles
drwxr-xr-x - sci-physics