3 files changed, 3 insertions, 0 deletions
diff --git a/src/compiler/GF/Compile/CheckGrammar.hs b/src/compiler/GF/Compile/CheckGrammar.hs
index 5c1743b74..1348d8e41 100644
--- a/src/compiler/GF/Compile/CheckGrammar.hs
+++ b/src/compiler/GF/Compile/CheckGrammar.hs
@@ -21,6 +21,7 @@
 -----------------------------------------------------------------------------
 
 module GF.Compile.CheckGrammar(checkModule) where
+import Prelude hiding ((<>)) -- GHC 8.4.1 clash with Text.PrettyPrint
 
 import GF.Infra.Ident
 import GF.Infra.Option
diff --git a/src/compiler/GF/Compile/Compute/ConcreteNew.hs b/src/compiler/GF/Compile/Compute/ConcreteNew.hs
index a77da88bf..f9edc931c 100644
--- a/src/compiler/GF/Compile/Compute/ConcreteNew.hs
+++ b/src/compiler/GF/Compile/Compute/ConcreteNew.hs
@@ -5,6 +5,7 @@ module GF.Compile.Compute.ConcreteNew
             normalForm,
             Value(..), Bind(..), Env, value2term, eval, vapply
            ) where
+import Prelude hiding ((<>)) -- GHC 8.4.1 clash with Text.PrettyPrint
 
 import GF.Grammar hiding (Env, VGen, VApp, VRecType)
 import GF.Grammar.Lookup(lookupResDefLoc,allParamValues)
diff --git a/src/compiler/GF/Compile/TypeCheck/RConcrete.hs b/src/compiler/GF/Compile/TypeCheck/RConcrete.hs
index 2fe08b256..88e324ff3 100644
--- a/src/compiler/GF/Compile/TypeCheck/RConcrete.hs
+++ b/src/compiler/GF/Compile/TypeCheck/RConcrete.hs
@@ -1,5 +1,6 @@
 {-# LANGUAGE PatternGuards #-}
 module GF.Compile.TypeCheck.RConcrete( checkLType, inferLType, computeLType, ppType ) where
+import Prelude hiding ((<>)) -- GHC 8.4.1 clash with Text.PrettyPrint
 
 import GF.Infra.CheckM
 import GF.Data.Operations