depends git &&
depends gnutls &&
depends json-c &&
depends libsoup &&
depends make &&

optional_depends gtk+3 \
                 "" \
                 "" \
                 "use GTK3 instead of GTK2?" &&

if is_depends_enabled $SPELL gtk+3 ; then
  depends webkitgtk3
else
  depends gtk+2 &&
  depends webkitgtk
fi

.