Magento 2 Override a type used in virtual type

So, I’m trying to override a class that is used to create a virtual type, which is used as a preference for another class (see the Core di.xml below). I have posted the excerpt from my di.xml as well. Everything compiles fine, but it never seems to pick up my overriding class. Since this is a preference for a class used as a type for a virtual type used as a preference for another class, I know I’m just missing something, but have never dealt with this complex an implementation. Any ideas would be appreciated.

My module di.xml

Core di.xml

    
        
            
                true
                MagentoInventorySalesModelIsProductSalableForRequestedQtyConditionIsCorrectQtyCondition
            
            
                true
                MagentoInventorySalesModelIsProductSalableForRequestedQtyConditionIsAnySourceItemInStockCondition
            
            
                10
                MagentoInventorySalesModelIsProductSalableForRequestedQtyConditionBackOrderCondition
            
            
                20
                MagentoInventorySalesModelIsProductSalableForRequestedQtyConditionManageStockCondition
            
            
                30
                MagentoInventorySalesModelIsProductSalableForRequestedQtyConditionIsSalableWithReservationsCondition