*E,MULTPK, packages, irun and -makelib

I am trying to simulate a design with multiple megawizard blocks generated by the Altera Quartus tools.  I am hoping to use the "-makelib/-endlib" options in irun to specify all of the files for each megawizard.  However, I have run into a problem with packages.  In this case, I have 2 megawizard directories that both have a file "altera_xcvr_functions.sv" containing packages used by other files in their respective directories.  A simplified argument list is shown below.  Both file1.sv and file2.sv do an "import altera_xcvr_functions::*;"

 -makelib nclib_dir1

dir1/altera_xcvr_functions.sv

dir1/file1.sv

-endlib

-makelib nclib_dir2

dir2/altera_xcvr_functions.sv

dir2/file2.sv

-endlib

When I try this, I get an error *E,MULTPK...Multiple (2) packages named "altera_xcvr_functions" were found in searched libraries:

-> found verilog_package nclib_dir1.altera_xcvr_functions:sv

-> found verilog_package nclib_dir2.altera_xcvr_functions:sv

Is there a way to keep the packages read in within a "-makelib/-endlib" pair local to just that library, and not visible outside of it?

I am using Incisive 11.10-p001.