Building Panda3D with MSVC 2015 and Python 3.5/3.6

Getting further in the build process, but now I’m seeing this:

(CustomBuild target) -> 
  c:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\contrib\open3dgc\o3dgcTimer.h(38): fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory (compiling source file C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\code\glTFExporter.cpp) [C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp-build\code\assimp.vcxproj] [C:\repos\panda3d-thirdparty\build\assimp.vcxproj]
  c:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\contrib\open3dgc\o3dgcTimer.h(38): fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory (compiling source file C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\code\glTFImporter.cpp) [C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp-build\code\assimp.vcxproj] [C:\repos\panda3d-thirdparty\build\assimp.vcxproj]
  c:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\contrib\open3dgc\o3dgcTimer.h(38): fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory (compiling source file C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\code\glTFExporter.cpp) [C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp-build\code\assimp.vcxproj] [C:\repos\panda3d-thirdparty\build\assimp.vcxproj]
  c:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\contrib\open3dgc\o3dgcTimer.h(38): fatal error C1083: Cannot open include file: 'sys/time.h': No such file or directory (compiling source file C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp\code\glTFImporter.cpp) [C:\repos\panda3d-thirdparty\build\assimp-prefix\src\assimp-build\code\assimp.vcxproj] [C:\repos\panda3d-thirdparty\build\assimp.vcxproj]