Error trying to compile lamba-except on ghc 8.

lambda-except_err

AST.hs:92:15: error:
    • No instance for (Data.Functor.Classes.Eq1 Expr)
        arising from the third field of ‘Module’ (type ‘Decls a’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Eq (Module a))

AST.hs:92:35: error:
    • No instance for (Data.Functor.Classes.Ord1 Expr)
        arising from the third field of ‘Module’ (type ‘Decls a’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Ord (Module a))

AST.hs:92:39: error:
    • No instance for (Data.Functor.Classes.Show1 Expr)
        arising from the third field of ‘Module’ (type ‘Decls a’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Show (Module a))

AST.hs:108:30: error:
    • No instance for (Data.Functor.Classes.Ord1 Expr)
        arising from the third field of ‘Lambda’
          (type ‘Scope (Named ()) Expr a’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Ord (Expr a))

AST.hs:108:34: error:
    • No instance for (Data.Functor.Classes.Show1 Expr)
        arising from the third field of ‘Lambda’
          (type ‘Scope (Named ()) Expr a’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Show (Expr a))