diff --git a/src/PureNix/Convert.hs b/src/PureNix/Convert.hs
index 83ff2d7..33b767a 100644
--- a/src/PureNix/Convert.hs
+++ b/src/PureNix/Convert.hs
@@ -5,6 +5,7 @@
 
 module PureNix.Convert (convert, ModuleInfo (..)) where
 
+import Control.Monad
 import Data.Bitraversable
 import qualified Data.Map as M
 import Data.Set (Set)
diff --git a/src/PureNix/Main.hs b/src/PureNix/Main.hs
index d393d8b..0ec3272 100644
--- a/src/PureNix/Main.hs
+++ b/src/PureNix/Main.hs
@@ -17,6 +17,7 @@ import qualified System.Exit as Sys
 import System.FilePath ((</>))
 import qualified System.FilePath as FP
 import System.IO
+import Control.Monad
 
 defaultMain :: IO ()
 defaultMain = do