Error compiling the Swift compiler; Swift does not support the SDK 'MacOSX10.13.sdk'

[AlexSedykh]

Swift(4.2) does not support the SDK 'MacOSX10.13.sdk'

Hello. Subj. I want to try Swift 4.2 from terminal(SPM). Downloaded and installed Xcode 10 beta. Downloaded and installed snapshot Swift 4.2 .pkg. And write $swift in terminal. And answer is next line: Swift does not support the SDK 'MacOSX10.13.sdk' My OS is 10.13.6. What I do wrong?

And may be today Xcode 10 will reales?