mapnik 4.0.0 mapnik/box2d.hpp: No such file or directory

[winsento]

Ubuntu 18.04 compile and install mapnik from master. mapnik-config -v => 4.0.0

When try install python binding (v.3.0.x branch):

src/mapnik_datasource.cpp:37:10: fatal error: mapnik/box2d.hpp: No such file or directory
 #include <mapnik/box2d.hpp>
          ^~~~~~~~~~~~~~~~~~
compilation terminated.
error: command 'c++' failed with exit status 1

[lightmare]

Not a bug. python-mapnik v3.0.x branch goes with mapnik v3.0.x branch.