drvfail009.hs:10:31: Expecting one more argument to ‘C’ Expected kind ‘* -> Constraint’, but ‘C’ has kind ‘* -> * -> Constraint’ In the newtype declaration for ‘T1’ drvfail009.hs:13:31: Cannot derive well-kinded instance of form ‘Monad (T2 ...)’ Class ‘Monad’ expects an argument of kind ‘* -> *’ In the newtype declaration for ‘T2’ drvfail009.hs:16:33: Can't make a derived instance of ‘Monad T3’ (even with cunning newtype deriving): cannot eta-reduce the representation type enough In the newtype declaration for ‘T3’ drvfail009.hs:19:42: Can't make a derived instance of ‘Monad T4’ (even with cunning newtype deriving): cannot eta-reduce the representation type enough In the newtype declaration for ‘T4’