The newly-introduced atk/atkwindow.h (commit
6101fd44) needs to be
"installed" as well...
copy ..\..\..\atk\atkvalue.h $(CopyDir)\include\atk-$(AtkApiVersion)\atk
+copy ..\..\..\atk\atkwindow.h $(CopyDir)\include\atk-$(AtkApiVersion)\atk
+
copy ..\..\..\atk\atk-enum-types.h $(CopyDir)\include\atk-$(AtkApiVersion)\atk
copy ..\..\..\atk\atkutil.h $(OutDir)\include\atk-$(AtkApiVersion)\atk

copy ..\..\..\atk\atkmisc.h $(OutDir)\include\atk-$(AtkApiVersion)\atk

copy ..\..\..\atk\atkvalue.h $(OutDir)\include\atk-$(AtkApiVersion)\atk

+copy ..\..\..\atk\atkwindow.h $(OutDir)\include\atk-$(AtkApiVersion)\atk

copy ..\..\..\atk\atk-enum-types.h $(OutDir)\include\atk-$(AtkApiVersion)\atk

mkdir $(OutDir)\lib