How to enable migrations (EF6) in an asp.net 5 project?

Question

I created a new class library (package) project (prior to VS 2015 RC used the even worse name of asp.net class library to represent the data layer. Just to be clear this is

Answer 1

In asp.net 5 project you have to use entity framework 7 and use the ef migration command from command line.

I just done a recap here How can I manage EF 6 migrations in visual studio 2015?