diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 0496383da2fb..cff41f865a7a 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -601,7 +601,9 @@ self: super: {
       mkdir -p $data/share/emacs
       ln -s $lispdir $data/share/emacs/site-lisp
     '';
-  }));
+  })).override {
+    haskell-src-exts = self.haskell-src-exts_1_19_1;
+  };
 
   # Make elisp files available at a location where people expect it.
   hindent = (overrideCabal super.hindent (drv: {