Hi, I have an Xcode 11.3.1 (Swift 5.1.3) project that's composed of several ABI stable binary frameworks. I'm trying to build it now with Xcode 12 beta 5 but on almost all libraries I got this error: Failed to build module 'MyModule' from its module interface; the compiler that produced it, 'Apple Swift version 5.1.3 effective-4.2 (swiftlang-1100.0.282.1 clang-1100.0.33.15)', may have used features that aren't supported by this compiler, 'Apple Swift version 5.3 effective-4.2 (swiftlang-1200.0.28.1 clang-1200.0.30.1)' The library contains all the architectures interface files, such as x86_64-apple-ios-simulator.swiftinterface with the expected content starting with // swift-interface-format-version: 1.0 // swift-compiler-version: Apple Swift version 5.1.3 effective-4.2 (swiftlang-1100.0.282.1 clang-1100.0.33.15) // swift-module-flags: -target x86_64-apple-ios11.0-simulator -enable-objc-interop -enable-library-evolution -swift-version 4.2 -enforce-exclusivity=checked -Onone -module-name MyModule I wonder if the issue resides in the -swift-version and -target version used. Has anyone experienced the same issue? Cheers