[omochi@omochi-MB2 infer]$ export TOOLCHAINS=org.swift.3020180227a [omochi@omochi-MB2 infer]$ swift --version Apple Swift version 4.1-dev (LLVM c4ec2ab808, Clang af436f313e, Swift 5f2f440067)[omochi@omochi-MB2 infer]$ export TOOLCHAINS=org.swift.3020180227a [omochi@omochi-MB2 infer]$ swift --version Apple Swift version 4.1-dev (LLVM c4ec2ab808, Clang af436f313e, Swift 5f2f440067)