diff --git a/Language/Haskell/GhcMod/FileMapping.hs b/Language/Haskell/GhcMod/FileMapping.hs
index 5d95868..baca49b 100644
--- a/Language/Haskell/GhcMod/FileMapping.hs
+++ b/Language/Haskell/GhcMod/FileMapping.hs
@@ -1,6 +1,5 @@
 module Language.Haskell.GhcMod.FileMapping
     ( loadMappedFile
-    , loadMappedFiles
     , unloadMappedFile
     , mapFile
     , fileModSummaryWithMapping
@@ -17,11 +16,6 @@ import Data.Time
 import Control.Monad.Trans.Maybe
 import GHC
 
-loadMappedFiles :: IOish m => GhcModT m ()
-loadMappedFiles = do
-  Options {fileMappings} <- options
-  mapM_ (uncurry loadMappedFile) fileMappings
-
 loadMappedFile :: IOish m => FilePath -> FileMapping -> GhcModT m ()
 loadMappedFile from fm =
   getCanonicalFileNameSafe from >>= (`addMMappedFile` fm)
diff --git a/Language/Haskell/GhcMod/Logger.hs b/Language/Haskell/GhcMod/Logger.hs
index 8389c18..57fc650 100644
--- a/Language/Haskell/GhcMod/Logger.hs
+++ b/Language/Haskell/GhcMod/Logger.hs
@@ -113,7 +113,7 @@ errBagToStrList env errs = let
     dflags = hsc_dflags env
     pu = icPrintUnqual dflags (hsc_IC env)
     st = mkUserStyle pu AllTheWay
- in runReader (errsToStr (bagToList errs)) GmPprEnv{rsDynFlags=dflags, rsPprStyle=st}
+ in runReader (errsToStr (bagToList errs)) GmPprEnv{gpeDynFlags=dflags, gpePprStyle=st}
 
 ----------------------------------------------------------------
 
diff --git a/src/GHCMod.hs b/src/GHCMod.hs
index 1c21738..c7f5030 100644
--- a/src/GHCMod.hs
+++ b/src/GHCMod.hs
@@ -359,9 +359,17 @@ main = do
 
 progMain :: (Options,[String]) -> IO ()
 progMain (globalOptions,cmdArgs) = hndle $ runGhcModT globalOptions $ handler $ do
+    let
+      loadMMappedFiles from (MemoryMapping Nothing) = do
+          src <- liftIO getFileSourceFromStdin
+          return (from, MemoryMapping $ Just src)
+      loadMMappedFiles from x = return (from, x)
+    fileMappings' <- forM (reverse $ fileMappings globalOptions) $ uncurry loadMMappedFiles
     case globalCommands cmdArgs of
       Just s -> gmPutStr s
-      Nothing -> ghcCommands cmdArgs
+      Nothing -> do
+        mapM_ (uncurry loadMappedFile) fileMappings'
+        ghcCommands cmdArgs
  where
    hndle action = do
      (e, _l) <- action
@@ -468,9 +476,7 @@ getFileSourceFromStdin = do
 
 ghcCommands :: IOish m => [String] -> GhcModT m ()
 ghcCommands []         = fatalError "No command given (try --help)"
-ghcCommands (cmd:args) = do
-    loadMappedFiles
-    gmPutStr =<< action args
+ghcCommands (cmd:args) = gmPutStr =<< action args
  where
    action = case cmd of
      _ | cmd == "list" || cmd == "modules" -> modulesCmd
diff --git a/test/FileMappingSpec.hs b/test/FileMappingSpec.hs
index ccd39be..18c583a 100644
--- a/test/FileMappingSpec.hs
+++ b/test/FileMappingSpec.hs
@@ -6,7 +6,6 @@ import Test.Hspec
 import TestUtils
 import qualified Data.Map as M
 import Dir
-import Data.Maybe
 
 import Language.Haskell.GhcMod
 
@@ -44,21 +43,6 @@ spec = do
               getMMappedFiles
             show mappedFiles `shouldBe` show (M.fromList ([] :: [(FilePath, FileMapping)]))
 
-      describe "loadMappedFiles" $ do
-        it "loads all file mappings passed as Options" $ do
-          let fm = [("File.hs", RedirectedMapping "File_Redir.hs"), ("File2.hs", MemoryMapping Nothing)]
-          mappedFiles <- run defaultOptions { fileMappings = fm } $
-            loadMappedFiles >> getMMappedFiles
-          dir <- getCurrentDirectory
-          M.lookup (dir </> "File.hs")  mappedFiles `shouldSatisfy` isJust
-          M.lookup (dir </> "File2.hs") mappedFiles `shouldSatisfy` isJust
-        it "prioritizes latter occurence of the same file" $ do
-          let fm = [("File.hs", RedirectedMapping "File_Redir.hs"), ("File.hs", MemoryMapping Nothing)]
-          mappedFiles <- run defaultOptions { fileMappings = fm } $
-            loadMappedFiles >> getMMappedFiles
-          dir <- getCurrentDirectory
-          show (M.lookup (dir </> "File.hs")  mappedFiles) `shouldBe` show (Just (MemoryMapping Nothing))
-
       describe "withMappedFile" $ do
         it "checks if there is a redirected file and calls and action with its FilePath" $ do
           withDirectory_ "test/data/file-mapping" $ do
@@ -85,15 +69,15 @@ spec = do
         it "checks redirected file if one is specified and outputs original filename" $ do
           withDirectory_ "test/data/file-mapping" $ do
             let fm = [("File.hs", RedirectedMapping "File_Redir.hs")]
-            res <- run defaultOptions {fileMappings = fm} $ do
-              loadMappedFiles
+            res <- run defaultOptions $ do
+              mapM_ (uncurry loadMappedFile) fm
               checkSyntax ["File.hs"]
             res `shouldBe` "File.hs:1:1:Warning: Top-level binding with no type signature: main :: IO ()\n"
         it "checks in-memory file if one is specified and outputs original filename" $ do
           withDirectory_ "test/data/file-mapping" $ do
             let fm = [("File.hs", MemoryMapping $ Just "main = putStrLn \"Hello World!\"\n")]
-            res <- run defaultOptions {fileMappings = fm} $ do
-              loadMappedFiles
+            res <- run defaultOptions $ do
+              mapM_ (uncurry loadMappedFile) fm
               checkSyntax ["File.hs"]
             res `shouldBe` "File.hs:1:1:Warning: Top-level binding with no type signature: main :: IO ()\n"
         it "lints redirected file if one is specified and outputs original filename" $ do