diff --git a/cabal-install-solver/src/Distribution/Solver/Types/NamedPackage.hs b/cabal-install-solver/src/Distribution/Solver/Types/NamedPackage.hs
index a213b9052a5..440e61c9038 100644
--- a/cabal-install-solver/src/Distribution/Solver/Types/NamedPackage.hs
+++ b/cabal-install-solver/src/Distribution/Solver/Types/NamedPackage.hs
@@ -1,6 +1,4 @@
-{-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE DeriveGeneric #-}
-{-# LANGUAGE DeriveFunctor #-}
 
 module Distribution.Solver.Types.NamedPackage
   ( NamedPackage (..)
diff --git a/cabal-install-solver/src/Distribution/Solver/Types/WithConstraintSource.hs b/cabal-install-solver/src/Distribution/Solver/Types/WithConstraintSource.hs
index 365bb40e492..5da8f2110d9 100644
--- a/cabal-install-solver/src/Distribution/Solver/Types/WithConstraintSource.hs
+++ b/cabal-install-solver/src/Distribution/Solver/Types/WithConstraintSource.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE DeriveFoldable #-}
-{-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DeriveTraversable #-}
 {-# LANGUAGE NamedFieldPuns #-}
diff --git a/cabal-install/src/Distribution/Client/ScriptUtils.hs b/cabal-install/src/Distribution/Client/ScriptUtils.hs
index 756d4e58a37..68e9292d4e6 100644
--- a/cabal-install/src/Distribution/Client/ScriptUtils.hs
+++ b/cabal-install/src/Distribution/Client/ScriptUtils.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
diff --git a/cabal-install/src/Distribution/Client/Setup.hs b/cabal-install/src/Distribution/Client/Setup.hs
index 2b1d2e212c1..8e64bd9e12f 100644
--- a/cabal-install/src/Distribution/Client/Setup.hs
+++ b/cabal-install/src/Distribution/Client/Setup.hs
@@ -1,6 +1,5 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
diff --git a/cabal-install/tests/UnitTests/Distribution/Client/ArbitraryInstances.hs b/cabal-install/tests/UnitTests/Distribution/Client/ArbitraryInstances.hs
index 534cb295b0b..8dcdb5c8cdf 100644
--- a/cabal-install/tests/UnitTests/Distribution/Client/ArbitraryInstances.hs
+++ b/cabal-install/tests/UnitTests/Distribution/Client/ArbitraryInstances.hs
@@ -1,7 +1,6 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE TypeApplications #-}
-{-# LANGUAGE TypeOperators #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
 module UnitTests.Distribution.Client.ArbitraryInstances