In Quartus we set the VHDL version with Settings -> Compiler Settings -> VHDL Input. How to inform the platform viewer about the VHDL version?

I am using the custom types and written those in the package. I am using them unconstrained like below

type  mydatatype is array (integer range <>) of unsigned;

And with the settings the VHDL version to 2008, I could analyze and synthesize in Quartus. I would like to make component with the code I have written so that can be used in the Platform Generator. So when I try to do that, I get an error

element type for array type cannot be unconstrained

How to set the VHDL version in Platform Generator to get rid of the error?

Best Regards