I'm trying to build cheese master using vala master and hit this error:

/home/cassidy/usr/bin/g-ir-compiler --includedir=. --includedir=. Cheese-3.0.gir -o Cheese-3.0.typelib
make[3]: quittant le répertoire « /home/cassidy/gnome/cheese/libcheese »
make[2]: quittant le répertoire « /home/cassidy/gnome/cheese/libcheese »
Making all in src
make[2]: entrant dans le répertoire « /home/cassidy/gnome/cheese/src »
/home/cassidy/usr/bin/valac  --thread --vapidir vapi --pkg config --pkg gtk+-3.0 --pkg gmodule-2.0 --pkg gee-1.0 --pkg clutter-1.0 --pkg clutter-gtk-1.0 --pkg gstreamer-0.10 --pkg libcanberra-gtk --pkg libcanberra --pkg eogthumbnav --pkg cheese-thumbview --pkg cheese-common --pkg clutter-tablelayout -C cheese-main.vala cheese-window.vala cheese-countdown.vala cheese-effects-manager.vala cheese-preferences.vala thumbview/cheese-thumb-view.c thumbview/cheese-thumbnail.c thumbview/eog-thumb-nav.c
clutter-tablelayout.vapi:15.3-15.50: error: `Clutter' already contains a definition for `TableLayout'
  public class TableLayout : Clutter.LayoutManager {
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
clutter-1.0.vapi:1477.2-1477.49: note: previous definition of `TableLayout' was here
	public class TableLayout : Clutter.LayoutManager {
	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
clutter-tablelayout.vapi:8.3-8.28: error: `Clutter' already contains a definition for `TableAlignment'
  public enum TableAlignment {
  ^^^^^^^^^^^^^^^^^^^^^^^^^^
clutter-1.0.vapi:2355.2-2355.27: note: previous definition of `TableAlignment' was here
	public enum TableAlignment {
	^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed: 2 error(s), 0 warning(s)