diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
index 6fefab4ad31..15c37ffbdee 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -84,12 +84,6 @@ self: super: {
   ## free >=4.9 && <5
   either = super.either_5;
 
-  ## Needs bump to a versioned attribute
-  ##     • Could not deduce (Semigroup (IterT m a))
-  ##         arising from the superclasses of an instance declaration
-  ##       from the context: (Monad m, Monoid a)
-  free = super.free_5_0_1;
-
   ## Needs bump to a versioned attribute
   ## Setup: Encountered missing dependencies:
   ## Cabal <2.2