我使用Xcode 7.3.1，部署目标7.0获得构建错误。
请帮我解决这个问题。
ProcessProductPackaging /Users/user1/Library/Developer/Xcode/DerivedData/appname-epjwtzplzmwqyrfttrtkajxjpgcx/Build/Intermediates/appname.build/Debug-iphonesimulator/appname.build/appname.app.xcent
cd /Users/user1/Downloads/appname-universal
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
builtin-productPackagingUtility /Users/user1/Downloads/appname-universal/appname -entitlements -format xml -o /Users/user1/Library/Developer/Xcode/DerivedData/appname-epjwtzplzmwqyrfttrtkajxjpgcx/Build/Intermediates/appname.build/Debug-iphonesimulator/appname.build/appname.app.xcent
error: The file appname couldn’t be opened because there is no such file.