xcellium compiles every RTL hierarchy into a "library_cell", how do I get rid of that?

Hi Cadence, 

I use a vendor provided makefile (really huge) with ncsim simulation. 

In the GUI I can see an extra "Library Cells" hierarchy is added to every RTL file. While I compile the same RTL in my own scripts, I won't see that Library Cells hierarchy. 

That hierarchy is not wrong but navigating requires double the effort. I suspect some flags/+OPT are used but what is that flag?

I knew only when a standard cell or analog model is used, that Library Cells is added. 

Thank you!