1 files changed, 11 insertions, 8 deletions
diff --git a/src/Process/Shell.hs b/src/Process/Shell.hs
index 94ba3c9..63d2f8a 100644
--- a/src/Process/Shell.hs
+++ b/src/Process/Shell.hs
@@ -11,6 +11,7 @@ module Process.Shell
 where
 
 import Control.Monad
+import Control.Monad.Trans
 import Data.ByteString qualified as B
 import Data.ByteString.Lazy qualified as LB
 import Data.ByteString.Lazy.UTF8 qualified as LB
@@ -35,21 +36,23 @@ class Processable a r where
 instance (Processable a r) => Processable (String -> a) (String -> r) where
   sh_ f x = sh_ (f x)
 
-instance Processable String (IO ()) where
+instance (MonadIO m) => Processable String (m ()) where
   sh_ s = do
-    runProcess_ (fromString s)
+    liftIO (runProcess_ (fromString s))
 
-instance (Outputable a) => Processable String (IO a) where
+instance (MonadIO m, Outputable a) => Processable String (m a) where
   sh_ s = do
-    fromLBS <$> readProcessInterleaved_ (fromString s)
+    fromLBS <$> liftIO (readProcessInterleaved_ (fromString s))
 
-instance (Outputable stdout, Outputable stderr) => Processable String (IO (stdout, stderr)) where
+instance (MonadIO m, Outputable stdout, Outputable stderr) => Processable String (m (stdout, stderr)) where
   sh_ s = do
-    (\(out, err) -> (fromLBS out, fromLBS err)) <$> readProcess_ (fromString s)
+    (\(out, err) -> (fromLBS out, fromLBS err))
+      <$> liftIO (readProcess_ (fromString s))
 
-instance (Outputable stdout, Outputable stderr) => Processable String (IO (ExitCode, stdout, stderr)) where
+instance (MonadIO m, Outputable stdout, Outputable stderr) => Processable String (m (ExitCode, stdout, stderr)) where
   sh_ s = do
-    (\(exitCode, out, err) -> (exitCode, fromLBS out, fromLBS err)) <$> readProcess (fromString s)
+    (\(exitCode, out, err) -> (exitCode, fromLBS out, fromLBS err))
+      <$> liftIO (readProcess (fromString s))
 
 class Outputable a where
   fromLBS :: LB.ByteString -> a