Re-export Data.Monoid from Expression.

src/Expression.hs

@@ -18,6 +18,7 @@ module Expression (
     getInput, getOutput,
 
     -- * Re-exports
+    module Data.Monoid,
     module Builder,
     module Package,
     module Stage,
@@ -25,6 +26,7 @@ module Expression (
     ) where
 
 import Control.Monad.Trans.Reader
+import Data.Monoid
 
 import Base
 import Package

src/Rules/Program.hs

@@ -3,7 +3,7 @@ module Rules.Program (buildProgram) where
 import Data.Char
 
 import Base
-import Expression hiding (splitPath)
+import Expression
 import GHC hiding (ghci)
 import Oracles
 import Rules.Actions