First stab at mtl 2.3 compliance.

This will no doubt produce a bunch of warnings and hence CI
failures, which we'll need to work around with explicit imports.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/Text/Pandoc/App/Opt.hs b/src/Text/Pandoc/App/Opt.hs
index 2c0cef5cd..ed95498e8 100644
--- a/src/Text/Pandoc/App/Opt.hs
+++ b/src/Text/Pandoc/App/Opt.hs
@@ -25,7 +25,9 @@ module Text.Pandoc.App.Opt (
           , applyDefaults
           , fullDefaultsPath
           ) where
-import Control.Monad.Except (MonadIO, liftIO, throwError, (>=>), foldM)
+import Control.Monad.Except (throwError)
+import Control.Monad.Trans (MonadIO, liftIO)
+import Control.Monad ((>=>), foldM)
 import Control.Monad.State.Strict (StateT, modify, gets)
 import System.FilePath ( addExtension, (</>), takeExtension, takeDirectory )
 import System.Directory ( canonicalizePath )