Lost the typing of context going from nexus/@schema to framework

[assertnotnull]

Not sure if I should create this as an issue already but we just switched from nexus/@Schema to the framework and I couldn't find in the API any options to set the type of the context.
In a short version preivously:

makeSchema({
  typegenAutoConfig: {
    sources: [
      {
        source: '@prisma/client',
        alias: 'client'
      },
      {
        source: require.resolve('./context'),
        alias: 'Context'
      }
    ],
    contextType: 'Context.Context'
  },
})

It helps to get validation when calling prisma again in a resolve.
My only solution right now is to type all the ctx as NexusContext.
I am also wondering why it isn't typed as that by default.