can't build xkcdViewer

build system: Ubuntu 12.10

libgranite-dev installed

/xkcdv/build$ make
[ 25%] Generating src/xkcdV.c, src/Settings.c
/home/gotwig/xkcdv/src/xkcdV.vala:5.16-5.41: error: The type name `Granite.Widgets.SourceList' could not be found
        public Granite.Widgets.SourceList sidebar;
               ^^^^^^^^^^^^^^^^^^^^^^^^^^
/home/gotwig/xkcdv/src/xkcdV.vala:22.9-22.34: error: The symbol `SourceList' could not be found
        Granite.Widgets.SourceList.ExpandableItem category_all;
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
/home/gotwig/xkcdv/src/xkcdV.vala:23.9-23.34: error: The symbol `SourceList' could not be found
        Granite.Widgets.SourceList.ExpandableItem category_favorites;
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
/home/gotwig/xkcdv/src/xkcdV.vala:24.9-24.34: error: The symbol `SourceList' could not be found
        Granite.Widgets.SourceList.ExpandableItem category_recent;
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed: 4 error(s), 0 warning(s)
make[2]: *** [src/xkcdV.c] Error 1
make[1]: *** [CMakeFiles/xkcdV.dir/all] Error 2
make: *** [all] Error 2