Swift project freshly cloned won't build on Mac

I'm trying to build the project with --xcode --debug flags and I run into:


The following build commands failed:
	CompileC /Users/Labs/Documents/swift-source/build/Xcode-DebugAssert/swift-macosx-x86_64/lib/ClangImporter/Swift.build/Debug/swiftClangImporter.build/Objects-normal/x86_64/CFTypeInfo.o lib/ClangImporter/CFTypeInfo.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
./utils/build-script: fatal error: command terminated with a non-zero exit status 65, aborting

I'm wondering what is the right way to get around this?

NVM, did an update-checkout again and it seems to be working...