Today jumbo creates files in the out/Default/gen folder, sometimes deep in it, with statements such as:

#include "../../../../../../../third_party/WebKit/Source/something/mojo/maybe/more_something_genetaretedgen_blink.cpp" 

With everything else added to that path, it can become a 260+ character path which breaks some Windows APIs resulting in confusing errors about "file not found". This happens to some but not everyone on today's master depending on your exact directory structure and build folder.

Suggested fix (by yngve@vivaldi) is to use root_path relative includes. I've been considering that already for other reasons so I think that is what I will do.

The one downside is that it requires changing the include_dirs field just to be sure that root path is the include path.