-- in.cue --
#TopLevel: [name=string]: {
	path:    string
	content: string
}

#Mid: #TopLevel & {
	myoutput: path: "/output"
}

val: #Mid & {} & {myoutput: {content: "foo"}} // Should work.
-- out/eval --
(struct){
  #TopLevel: (#struct){
  }
  #Mid: (#struct){
    myoutput: (#struct){
      path: (string){ "/output" }
      content: (string){ string }
    }
  }
  val: (#struct){
    myoutput: (#struct){
      path: (string){ "/output" }
      content: (string){ "foo" }
    }
  }
}
-- out/compile --
--- in.cue
{
  #TopLevel: {
    [string]: {
      path: string
      content: string
    }
  }
  #Mid: (〈0;#TopLevel〉 & {
    myoutput: {
      path: "/output"
    }
  })
  val: ((〈0;#Mid〉 & {}) & {
    myoutput: {
      content: "foo"
    }
  })
}