diff --git a/compiler/ghc/default.nix b/compiler/ghc/default.nix
index 929a3f0eb2..a84d394c0a 100644
--- a/compiler/ghc/default.nix
+++ b/compiler/ghc/default.nix
@@ -259,6 +259,8 @@ let
       compiler-nix-name =
         if builtins.compareVersions ghc-version "9.4.7" < 0
           then "ghc928"
+        else if buildPackages.haskell.compiler ? ghc966
+          then "ghc966"
         else if buildPackages.haskell.compiler ? ghc964
           then "ghc964"
         else "ghc962";