diff --git a/pkgs/top-level/release-haskell.nix b/pkgs/top-level/release-haskell.nix
index d2e9e58e4ba9..62fedeead0f6 100644
--- a/pkgs/top-level/release-haskell.nix
+++ b/pkgs/top-level/release-haskell.nix
@@ -72,6 +72,7 @@ let
     ghc963
     ghc964
     ghc965
+    ghc966
     ghc981
     ghc982
     ghc9101