Do not hide Shake.parallel (we no longer have conflicting Way.parallel).

src/Base.hs

-{-# OPTIONS_GHC -fno-warn-dodgy-imports #-} -- for Development.Shake.parallel
-
 module Base (
     -- * General utilities
     module Control.Applicative,
@@ -35,7 +33,7 @@ import Data.Function
 import Data.List.Extra
 import Data.Maybe
 import Data.Monoid
-import Development.Shake hiding (parallel, unit, (*>), Normal)
+import Development.Shake hiding (unit, (*>), Normal)
 import Development.Shake.Classes
 import Development.Shake.FilePath
 import System.Console.ANSI