After I installed the mentioned update package, I got the error below -
It seems like the assembly needs to be updated from "Sitecore.Reference.Storefront.InstallPostStep, Sitecore.Reference.Storefront.Powered.by.Microsoft.Dynamics.dll" to "Sitecore.Reference.Storefront.InstallPostStep, Sitecore.Reference.Storefront.Common.dll" - as I can see the type in question Sitecore.Reference.Storefront.InstallPostStep in the Sitecore.Reference.Storefront.Common.dll.
After I installed the mentioned update package, I got the error below -![image](https://cloud.githubusercontent.com/assets/8376501/20630932/0bb0a876-b302-11e6-9b42-226238c8d069.png)
It seems like the assembly needs to be updated from "Sitecore.Reference.Storefront.InstallPostStep, Sitecore.Reference.Storefront.Powered.by.Microsoft.Dynamics.dll" to "Sitecore.Reference.Storefront.InstallPostStep, Sitecore.Reference.Storefront.Common.dll" - as I can see the type in question Sitecore.Reference.Storefront.InstallPostStep in the Sitecore.Reference.Storefront.Common.dll.