Xcode Project Additional command line parameters

how I can build .ipa file using Xcode Project? 

on the Additional command line parameters part. 

what should I command the xcodebuild ? 

I try command as below

xcodebuild -workspace EGSSwift.xcworkspace -scheme N2Live_QA -exportArchive -archivePath /EGSSwift/EGSSwift -exportPath c:\1234/N2LiveQA.ipa -exportOptionsPlist C:\1234

but get the error : xcodebuild: error: option '-workspace' may only be provided once