diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
index 5813e29d8ffe..322dc986af9a 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
@@ -151,7 +151,7 @@ with haskellLib;
     ];
   }) super.generic-arbitrary;
 
-  # Unreported: GHC crashes
+  # https://gitlab.haskell.org/ghc/ghc/-/issues/25930
   generic-lens = dontCheck super.generic-lens;
 
   # Cabal 3.14 regression (incorrect datadir in tests): https://github.com/haskell/cabal/issues/10717