Fix build with mtl 2.2HEADmaster

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Job.hs b/src/Job.hs
index 2de0bb6..20e6fd5 100644
--- a/src/Job.hs
+++ b/src/Job.hs
@@ -389,7 +389,7 @@ prepareJob dir job inner = do
             checkoutAt subtree $ checkoutPath </> fromMaybe "" dest
 
         liftIO $ forM_ (jobUses job) $ \( jid, aname ) -> do
-            modifyError (userError . T.unpack) $ do
+            either (throwError . userError . T.unpack) pure <=< runExceptT $ do
                 wpath <- getArtifactWorkPath dir jid aname
                 let target = checkoutPath </> wpath
                 liftIO $ createDirectoryIfMissing True $ takeDirectory target