Unused qsys module causes fitter failure

My design contains up-to 4 DDR interfaces each is defined by emif qsys module.

The project file adds a different emif qsys file to the project for each DDR interface.

In general I build with only one DDR interface instantiated, this is done with an `ifdef that removes the instantiation of the other DDR interfaces.

When I build with any of the DDR interfaces removed from the design the fitter fails with an error :

Error: The auto-constraining script was not able to detect any instance for core < p510t_bank3_altera_emif_arch_nf_170_iamurii >

The problem is that the automated build flow may build a configuration that has one or more DDR interfaces not instantiated.

I dont want to have a different project file for each configuration.

Is there a way for the fitter to not use the scripts from a qsys module that is not instantiated?