diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 2164fc6a9d8..d23d504d110 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1244,9 +1244,6 @@ self: super: {
     ];
   });
 
-  # Needs the corresponding version of haskell-src-exts.
-  haskell-src-exts-simple = super.haskell-src-exts-simple.override { haskell-src-exts = self.haskell-src-exts_1_23_1; };
-
   # https://github.com/Daniel-Diaz/HaTeX/issues/144
   HaTeX = dontCheck super.HaTeX;