1 files changed, 6 insertions, 12 deletions
diff --git a/src/Data/Array/Nested/Internal.hs b/src/Data/Array/Nested/Internal.hs
index 3f885e4..440f52b 100644
--- a/src/Data/Array/Nested/Internal.hs
+++ b/src/Data/Array/Nested/Internal.hs
@@ -861,10 +861,9 @@ data ListR n i where
 deriving instance Show i => Show (ListR n i)
 deriving instance Eq i => Eq (ListR n i)
 deriving instance Ord i => Ord (ListR n i)
+deriving instance Functor (ListR n)
 infixr 3 :::
 
-deriving stock instance Functor (ListR n)
-
 instance Foldable (ListR n) where
   foldr f z l = foldr f z (listRToList l)
 
@@ -881,8 +880,7 @@ type role IxR nominal representational
 type IxR :: INat -> Type -> Type
 newtype IxR n i = IxR (ListR n i)
   deriving (Show, Eq, Ord)
-
-deriving newtype instance Functor (IxR n)
+  deriving newtype (Functor)
 
 instance Foldable (IxR n) where
   foldr f z (IxR l) = foldr f z l
@@ -915,8 +913,7 @@ type role ShR nominal representational
 type ShR :: INat -> Type -> Type
 newtype ShR n i = ShR (ListR n i)
   deriving (Show, Eq, Ord)
-
-deriving newtype instance Functor (ShR n)
+  deriving newtype (Functor)
 
 instance Foldable (ShR n) where
   foldr f z (ShR l) = foldr f z l
@@ -1083,10 +1080,9 @@ data ListS sh i where
 deriving instance Show i => Show (ListS sh i)
 deriving instance Eq i => Eq (ListS sh i)
 deriving instance Ord i => Ord (ListS sh i)
+deriving instance Functor (ListS sh)
 infixr 3 ::$
 
-deriving stock instance Functor (ListS sh)
-
 instance Foldable (ListS sh) where
   foldr f z l = foldr f z (listSToList l)
 
@@ -1104,8 +1100,7 @@ type role IxS nominal representational
 type IxS :: [Nat] -> Type -> Type
 newtype IxS sh i = IxS (ListS sh i)
   deriving (Show, Eq, Ord)
-
-deriving newtype instance Functor (IxS sh)
+  deriving newtype (Functor)
 
 instance Foldable (IxS sh) where
   foldr f z (IxS l) = foldr f z l
@@ -1135,8 +1130,7 @@ type role ShS nominal representational
 type ShS :: [Nat] -> Type -> Type
 newtype ShS sh i = ShS (ListS sh i)
   deriving (Show, Eq, Ord)
-
-deriving newtype instance Functor (ShS sh)
+  deriving newtype (Functor)
 
 instance Foldable (ShS sh) where
   foldr f z (ShS l) = foldr f z l