ios – Decl has a package deal entry degree however no -package-name was handed

I am attempting to implement newly added entry specifier package deal

    public class PackageDemoLibrary {
    
    public init() {}
    
    public var publicVariable = ""
    package deal var packageVariable = ""
  }

but it surely’s saying Decl has a package deal entry degree however no -package-name was handed.

as per documentation: A brand new flag -package-name is handed right down to a commandline invocation, as follows. Learn extra right here

swiftc -module-name Engine -package-name gamePkg ...
swiftc -module-name Sport -package-name gamePkg ...
swiftc -module-name App -package-name appPkg ...

I am unsure how can I add -package identify in to my SPM Bundle.

Anybody understand how can I eliminate this error