So I have a pretty old React Native app that I maintain. Think 6-7 years old and still using libraries from that time. One of the libraries I use is: react-native-job-queue and I cannot seem to get past this error no matter what switches I give the compiler: Command SwiftVerifyEmittedModuleInterface failed with a nonzero exit code I get this for another React Native library as well. No code has changed, nothing in the project has changed. It was just the XCode / iOS / MacOS upgrade that broke this. I've tried the following OTHER SWIFT FLAGS: -disable-interface-file-verification -no-verify-emitter-module-interface and others I'm probably forgetting. My .xcconfig has these: OTHER_SWIFT_FLAGS = $(inherited) -Xfrontend -disable-implicit-swift-modules -no-verify-emitter-module-interface SWIFT_VERIFY_EMITTED_MODULE_INTERFACE = NO SWIFT_EMIT_MODULE_INTERFACE_VERIFY=NO None of these actually stop the verifier so the compile fails every time. Any help is appreciated!!