Error found:
at tests/purs/failing/NewtypeInstance3.purs:8:1 - 8:43 (line 8, column 1 - line 8, column 43)

  Cannot derive newtype instance for
                 
    Main.Nullary 
                 
  Make sure this is a newtype.


See https://github.com/purescript/documentation/blob/master/errors/InvalidNewtypeInstance.md for more information,
or to contribute content related to this error.