diff --git a/cardano-node/src/Cardano/Node/LedgerEvent.hs b/cardano-node/src/Cardano/Node/LedgerEvent.hs
index dfc0e58e5eb..2f4e9263f30 100644
--- a/cardano-node/src/Cardano/Node/LedgerEvent.hs
+++ b/cardano-node/src/Cardano/Node/LedgerEvent.hs
@@ -6,7 +6,6 @@
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PartialTypeSignatures #-}
 {-# LANGUAGE RankNTypes #-}
@@ -115,7 +114,7 @@ import           Ouroboros.Consensus.Ledger.Extended (ExtLedgerState)
 import           Ouroboros.Consensus.Shelley.Ledger (ShelleyBlock, ShelleyLedgerEvent (..))
 import           Ouroboros.Consensus.TypeFamilyWrappers
 import           Ouroboros.Network.Block (ChainHash (BlockHash, GenesisHash), HeaderHash)
-import           Prelude (type (~))
+import           Prelude hiding ((.), String, MonadFail (..), map, print, putStrLn, show)
 import           System.IO (hIsEOF)
 
 type LedgerState crypto =
diff --git a/nix/haskell.nix b/nix/haskell.nix
index 8d902acb3b0..02464e3e06f 100644
--- a/nix/haskell.nix
+++ b/nix/haskell.nix
@@ -20,7 +20,7 @@ let
     {
       src = ../.;
       name = "cardano-node";
-      compiler-nix-name = lib.mkDefault "ghc963";
+      compiler-nix-name = lib.mkDefault "ghc928";
       # extra-compilers
       flake.variants = lib.genAttrs [ ] (x: {compiler-nix-name = x;});
       cabalProjectLocal = ''