Hi Eric, probably not very relevant (both extensions far above the quorum) but it seems odd to include
EmptyDataDecls: yes
but then say
EmptyDataDeriving: no
Als note that the docs at https://downloads.haskell.org/ghc/latest/docs/html/users_guide/glasgow_exts.... say “The EmptyDataDeriving flag is only required to enable deriving of these four “standard” type classes (which are mentioned in the Haskell Report). Other extensions to the deriving mechanism, which are explained below in greater detail, do not require EmptyDataDeriving to be used in conjunction with empty data types.” So enabling the other DerivingFoo extensions without EmptyDataDeriving is somewhat non-uniform. Cheers, Joachim -- Joachim Breitner mail@joachim-breitner.de http://www.joachim-breitner.de/