diff --git a/preamble.cabal b/preamble.cabal
--- a/preamble.cabal
+++ b/preamble.cabal
@@ -1,5 +1,5 @@
 name:                  preamble
-version:               0.0.20
+version:               0.0.21
 synopsis:              Yet another prelude.
 description:           A prelude built on basic-prelude.
 homepage:              https://github.com/swift-nav/preamble
diff --git a/src/Preamble/Prelude.hs b/src/Preamble/Prelude.hs
--- a/src/Preamble/Prelude.hs
+++ b/src/Preamble/Prelude.hs
@@ -5,7 +5,6 @@
 --
 module Preamble.Prelude
   ( module Exports
-  , runResourceT
   , maybe'
   , either'
   , maybe_
@@ -20,12 +19,11 @@
   , (-:-)
   ) where
 
-import BasicPrelude                 as Exports hiding (bool)
-import Control.Lens                 as Exports hiding (uncons, (.=), (<.>))
-import Control.Monad.Trans.Resource
-import Data.Bool                    as Exports
+import BasicPrelude as Exports hiding (bool)
+import Control.Lens as Exports hiding (uncons, (.=), (<.>))
+import Data.Bool    as Exports
 import Data.Text
-import Safe                         as Exports (headMay, initMay, tailMay)
+import Safe         as Exports (headMay, initMay, tailMay)
 
 -- | maybe with hanging function.
 --
diff --git a/src/Preamble/Trace.hs b/src/Preamble/Trace.hs
--- a/src/Preamble/Trace.hs
+++ b/src/Preamble/Trace.hs
@@ -12,6 +12,7 @@
   , traceInfo
   , traceWarn
   , traceError
+  , (.=)
   ) where
 
 import           Control.Monad.Logger
diff --git a/src/Preamble/Types/Alias.hs b/src/Preamble/Types/Alias.hs
--- a/src/Preamble/Types/Alias.hs
+++ b/src/Preamble/Types/Alias.hs
@@ -4,7 +4,9 @@
 
 -- | Various alias types.
 --
-module Preamble.Types.Alias where
+module Preamble.Types.Alias
+  ( module Preamble.Types.Alias
+  ) where
 
 import Control.Monad.Catch
 import Control.Monad.Logger
diff --git a/src/Preamble/Types/Ctx.hs b/src/Preamble/Types/Ctx.hs
--- a/src/Preamble/Types/Ctx.hs
+++ b/src/Preamble/Types/Ctx.hs
@@ -5,7 +5,9 @@
 
 -- | Context objects for monad transformers.
 --
-module Preamble.Types.Ctx where
+module Preamble.Types.Ctx
+  ( module Preamble.Types.Ctx
+  ) where
 
 import Control.Monad.Catch
 import Control.Monad.Logger
diff --git a/src/Preamble/Types/Trans.hs b/src/Preamble/Types/Trans.hs
--- a/src/Preamble/Types/Trans.hs
+++ b/src/Preamble/Types/Trans.hs
@@ -7,7 +7,10 @@
 
 -- | Monad transformer.
 --
-module Preamble.Types.Trans where
+module Preamble.Types.Trans
+  ( module Preamble.Types.Trans
+  , runResourceT
+  ) where
 
 import Control.Monad.Base
 import Control.Monad.Catch