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 7a96de305fb..e5c26439347 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -148,16 +148,6 @@ self: super: {
   ## free ==4.*, template-haskell >=2.4 && <2.13
   lens = super.lens_4_16;
 
-  ## Needs bump to a versioned attribute
-  regex-tdfa = overrideCabal super.regex-tdfa_1_2_3 (drv: {
-    ##     • No instance for (Semigroup (CharMap a))
-    ##         arising from the superclasses of an instance declaration
-    ##     • In the instance declaration for ‘Monoid (CharMap a)’
-    ##
-    ## error: while evaluating ‘overrideCabal’ at nixpkgs://pkgs/development/haskell-modules/lib.nix:37:24, called from /home/deepfire/nixpkgs/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix:188:16:
-    editedCabalFile = null;
-  });
-
   ## Needs bump to a versioned attribute
   ## Setup: Encountered missing dependencies:
   ## doctest >=0.11.1 && <0.14