Sitecore Experience Commerce - Customer.Sample.Solution won't build

When starting down the road of creating my own plugin for Experience Commerce, I opened up the Customer.Sample.Solution from version 2.0.1922 of the commerce engine SDK. However the solution (and Sitecore.Commerce.Engine project in particular) would not build due to a missing DLL reference.

Sitecore Commerce Engine missing reference

The Sitecore.Commerce.Plugin.Content reference could not be located. After some digging it appeared that the nuget feed (included with the solution) for Sitecore Commerce was an old preview feed which was no longer active.

Invalid Sitecore Experience Commerce nuget feed

Updating this to the live Sitecore Commerce nuget feed allowed the reference to be found and the solution to build.