depends meson   &&
depends python3 &&
depends ninja-build-system &&
depends pkgconfig &&
depends libffi    &&
optional_depends expat scanner={true,false} 'build wayland-scanner' &&
if is_depends_enabled $SPELL expat;then
  depends libxml2
fi &&
optional_depends graphviz  documentation={true,false} 'build documentation' &&
if is_depends_enabled $SPELL graphviz;then
  depends doxygen
  depends libxslt
  depends xmlto
fi