I followed the video tutorial on downloading the unreal source code. Downloaded the zip files, cloned the repo, added the zip files, ran the bat file, opened the project and chose to bulid UE4 and got these errors.
Error 1 error C1083: Cannot open include file: 'tbb/scalable_allocator.h': No such file or directory D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\HAL\MallocTBB.cpp 25 1 UE4
Error 2 error C1083: Cannot open include file: 'unicode/locid.h': No such file or directory D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMisc.cpp 21 1 UE4
Error 3 error C1083: Cannot open include file: 'ThirdParty/zlib/zlib-1.2.5/Inc/zlib.h': No such file or directory D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\Misc\Compression.cpp 13 1 UE4
Error 4 error : Failed to produce item: D:\DATA\GitHub\UnrealEngine\Engine\Binaries\Win64\UnrealHeaderTool-Core.dll D:\DATA\GitHub\UnrealEngine\Engine\Intermediate\ProjectFiles\ERROR UE4
Error 5 error MSB3073: The command "..\..\Build\BatchFiles\Build.bat UE4Editor Win64 Development" exited with code -1. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets 38 5 UE4
1>------ Build started: Project: UE4, Configuration: Development_Editor x64 ------
1> Building UnrealHeaderTool...
1> Performing 8 actions (max 4 parallel jobs)
1> Module.Core.2_of_8.cpp
1> Module.Core.1_of_8.cpp
1> Module.Core.3_of_8.cpp
1>D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\HAL\MallocTBB.cpp(25): fatal error C1083: Cannot open include file: 'tbb/scalable_allocator.h': No such file or directory
1>D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMisc.cpp(21): fatal error C1083: Cannot open include file: 'unicode/locid.h': No such file or directory
1>D:\DATA\GitHub\UnrealEngine\Engine\Source\Runtime\Core\Private\Misc\Compression.cpp(13): fatal error C1083: Cannot open include file: 'ThirdParty/zlib/zlib-1.2.5/Inc/zlib.h': No such file or directory
1> -------- End Detailed Actions Stats -----------------------------------------------------------
1>ERROR : UBT error : Failed to produce item: D:\DATA\GitHub\UnrealEngine\Engine\Binaries\Win64\UnrealHeaderTool-Core.dll
1> Cumulative action seconds (8 processors): 0.00 building projects, 2.26 compiling, 0.00 creating app bundles, 0.00 generating debug info, 0.00 linking, 0.00 other
1> UBT execution time: 7.94 seconds
1> UnrealHeaderTool failed for target 'UE4Editor' (platform: Win64, module info: D:\DATA\GitHub\UnrealEngine\Engine\Intermediate\Build\Win64\UE4Editor\Development\UnrealHeaderTool.manifest).
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command "..\..\Build\BatchFiles\Build.bat UE4Editor Win64 Development" exited with code -1.
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========
This is with a clean install of Visual Studio 2013 express.