error: Multiple commands produce

error: Multiple commands produce '/Users/sunjun/Library/Developer/Xcode/DerivedData/项目名-gycyuvvsvkrhkadpfstvelurwdda/Build/Products/Debug-iphoneos/项目名.app/README.txt':

1) Target '项目名' (project '项目名') has copy command from '/Users/sunjun/Desktop/项目名/项目名/Classes/ThirdParty/UMeng/SocialLibraries/WeChat/README.txt' to '/Users/sunjun/Library/Developer/Xcode/DerivedData/项目名-gycyuvvsvkrhkadpfstvelurwdda/Build/Products/Debug-iphoneos/项目名.app/README.txt'

2) Target '项目名' (project '项目名') has copy command from '/Users/sunjun/Desktop/项目名/项目名/Classes/ThirdParty/WeChatSDK/README.txt' to '/Users/sunjun/Library/Developer/Xcode/DerivedData/项目名-gycyuvvsvkrhkadpfstvelurwdda/Build/Products/Debug-iphoneos/项目名.app/README.txt'

更新Xcode 10，遇到的坑

解决：

在File > Project/Workspace Settings中的Share Project/Workspace Settings 里build system 将New Build System(Default)切换成Legacy build system。