From b2b09e45e3cba3f19c86b2925a58b468b474c466 Mon Sep 17 00:00:00 2001
From: Hamish Mackenzie <Hamish.K.Mackenzie@gmail.com>
Date: Fri, 28 Mar 2025 15:09:05 +1300
Subject: [PATCH] Build hadrian with ghc 9.6.6 if available.

---
 compiler/ghc/default.nix | 2 ++
 1 file changed, 2 insertions(+)

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";