 These -X<blah> flags cannot be reversed with -XNo<blah>
languageFlags :: [FlagSpec Language]
languageFlags = [
  ( "Haskell98",   Haskell98, nop ),
  ( "Haskell2010", Haskell2010, nop )
  ]

--
languageFlags :: [FlagSpec Language]
languageFlags = [
  ( "Haskell98",   Haskell98, nop ),
  ( "Haskell2010", Haskell2010, nop )
  ]
languageFlags = [
  ( "Haskell98",   Haskell98, nop ),
  ( "Haskell2010", Haskell2010, nop )
  ]