Can't compile

[nicolyon]

Hello, i wanna try your project but the build directory was needed but it is not in the git.
I create an empty one but the autogen.sh request vala.am i made an empty vala.am but i can't compile after configure...

make
Making all in lib
make[1] : on entre dans le répertoire « /var/lib/chromium/Downloads/xfce-dock-plugin/lib »
VALAC libxfce4_dock_la_vala.stamp
cairo/cairo-context.vala:32.33-32.37: error: The symbol `Cairo' could not be found
public class Xdp.CairoContext : Cairo.Context
....... and complain about gtk too