Compilation fatal error

Has anyone encountered any issue building swift using Xcode 10.0 beta (10L176w) as I've tried few times and followed the instructions specified in Swift github page with following command?

utils/build-script --release-debuginfo --xcode

but i am getting following compilation failure?

The following build commands failed:
CompileC /Users/lakpadindu/Develop/swift-source/build/Xcode-RelWithDebInfoAssert/swift-macosx-x86_64/stdlib/public/stubs/ /Users/lakpadindu/Develop/swift-source/build/Xcode-RelWithDebInfoAssert/swift-macosx-x86_64/stdlib/public/stubs/8/ normal x86_64 objective-c++
(1 failure)
utils/build-script: fatal error: command terminated with a non-zero exit status 65, aborting

Please ignore as the issue has been reported earlier at Master build fails macOS due to error: Build input file cannot be found: