limit declaration contextual menu options to source directory?

I often have build and pub directories with nearly identical copies of my source files.

When I right click on a variable/function/etc in intellij 12, it brings up a contextual menu with links to where that variable/function/etc was declared.

Because of the duplicates, these contextual menus are littered with links to files not in the source directory.

How do I limit this menu to only my source files?