diff --git a/lib/Polysemy/Conc/Effect/Sync.hs b/lib/Polysemy/Conc/Effect/Sync.hs
--- a/lib/Polysemy/Conc/Effect/Sync.hs
+++ b/lib/Polysemy/Conc/Effect/Sync.hs
@@ -4,6 +4,8 @@
 module Polysemy.Conc.Effect.Sync where
 
 import Polysemy.Time (TimeUnit)
+import Prelude hiding (empty, try)
+
 import Polysemy.Conc.Effect.Scoped (Scoped_)
 
 -- |Abstracts an 'Control.Concurrent.MVar'.
diff --git a/lib/Polysemy/Conc/Effect/SyncRead.hs b/lib/Polysemy/Conc/Effect/SyncRead.hs
--- a/lib/Polysemy/Conc/Effect/SyncRead.hs
+++ b/lib/Polysemy/Conc/Effect/SyncRead.hs
@@ -4,7 +4,7 @@
 module Polysemy.Conc.Effect.SyncRead where
 
 import Polysemy.Time (TimeUnit)
-import Prelude hiding (empty)
+import Prelude hiding (empty, try)
 
 -- |An interface to a shared variable ('MVar') that can only be read.
 data SyncRead (d :: Type) :: Effect where
diff --git a/polysemy-conc.cabal b/polysemy-conc.cabal
--- a/polysemy-conc.cabal
+++ b/polysemy-conc.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           polysemy-conc
-version:        0.11.0.0
+version:        0.11.1.0
 synopsis:       Polysemy effects for concurrency
 description:    See https://hackage.haskell.org/package/polysemy-conc/docs/Polysemy-Conc.html
 category:       Concurrency