Squash some warnings

src/Project.hs

@@ -18,8 +18,8 @@ module Project
   ) where
 
 import Common
+import Control.Monad.Extra
 import Data.Maybe
-import Extra
 import Network.URI
 import Resources
 import qualified System.Directory as D

src/Resources.hs

@@ -9,8 +9,9 @@ module Resources
 import Common
 import Control.Exception
 import Control.Monad
-import Extra
+import Control.Monad.Extra
 import System.Directory
+import System.Environment
 import System.Exit
 import System.FilePath.Posix
 import System.Process