Nested TH not allowed in declarations

I tried to do the following with the singletons and derive libraries:

$(singletons [d|
  data CrudRoute = AddR | EditR | DeleteR | ViewR
    deriving (Eq,Ord,Enum,Bounded,Show)
  data MyRoute = UsersR | ProfileR | RenameR | DogR CrudRoute
    deriving (Eq,Ord,Show)
  $( derive makeEnum ''MyRoute ) 
  |])

GHC fails with the following error message:

Splices within declaration brackets not (yet) handled by Template Haskell

Here is the github issue where this originated: https://github.com/goldfirere/singletons/issues/135#issuecomment-158936027

Trac metadata

Trac field	Value
Version	7.10.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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