diff --git a/Language/Haskell/GhcMod/Error.hs b/Language/Haskell/GhcMod/Error.hs
index 11df046..e69cc34 100644
--- a/Language/Haskell/GhcMod/Error.hs
+++ b/Language/Haskell/GhcMod/Error.hs
@@ -17,7 +17,6 @@
 {-# LANGUAGE ExistentialQuantification #-}
 module Language.Haskell.GhcMod.Error (
     GhcModError(..)
-  , GMConfigStateFileError(..)
   , GmError
   , gmeDoc
   , ghcExceptionDoc
@@ -53,37 +52,6 @@ import Language.Haskell.GhcMod.Pretty
 
 type GmError m = MonadError GhcModError m
 
-gmCsfeDoc :: GMConfigStateFileError -> Doc
-gmCsfeDoc GMConfigStateFileNoHeader = text $
-        "Saved package config file header is missing. "
-        ++ "Try re-running the 'configure' command."
-
-gmCsfeDoc GMConfigStateFileBadHeader = text $
-        "Saved package config file header is corrupt. "
-        ++ "Try re-running the 'configure' command."
-
-gmCsfeDoc GMConfigStateFileNoParse = text $
-        "Saved package config file body is corrupt. "
-        ++ "Try re-running the 'configure' command."
-
-gmCsfeDoc GMConfigStateFileMissing = text $
-    "Run the 'configure' command first."
-
--- gmCsfeDoc (ConfigStateFileBadVersion oldCabal oldCompiler _) = text $
---         "You need to re-run the 'configure' command. "
---         ++ "The version of Cabal being used has changed (was "
---         ++ display oldCabal ++ ", now "
---         ++ display currentCabalId ++ ")."
---         ++ badCompiler
---       where
---         badCompiler
---           | oldCompiler == currentCompilerId = ""
---           | otherwise =
---               " Additionally the compiler is different (was "
---               ++ display oldCompiler ++ ", now "
---               ++ display currentCompilerId
---               ++ ") which is probably the cause of the problem."
-
 gmeDoc :: GhcModError -> Doc
 gmeDoc e = case e of
     GMENoMsg ->
@@ -91,12 +59,11 @@ gmeDoc e = case e of
     GMEString msg ->
         text msg
     GMECabalConfigure msg ->
-        text "Configuring cabal project failed: " <> gmeDoc msg
-    GMECabalFlags msg ->
-        text "Retrieval of the cabal configuration flags failed: " <> gmeDoc msg
-    GMECabalComponent cn ->
-        text "Cabal component " <> quotes (gmComponentNameDoc cn)
-                                <> text " could not be found."
+        text "Configuring cabal project failed" <+>: gmeDoc msg
+    GMEStackConfigure msg ->
+        text "Configuring stack project failed" <+>: gmeDoc msg
+    GMEStackBootstrap msg ->
+        text "Bootstrapping stack project environment failed" <+>: gmeDoc msg
     GMECabalCompAssignment ctx ->
         text "Could not find a consistent component assignment for modules:" $$
           (nest 4 $ foldr ($+$) empty $ map ctxDoc ctx) $$
@@ -125,7 +92,6 @@ gmeDoc e = case e of
         compsDoc sc | Set.null sc = text "has no known components"
         compsDoc sc = fsep $ punctuate comma $
                         map gmComponentNameDoc $ Set.toList sc
-
     GMEProcess _fn cmd args emsg -> let c = showCommandForUser cmd args in
         case emsg of
           Right err ->
@@ -138,11 +104,6 @@ gmeDoc e = case e of
     GMETooManyCabalFiles cfs ->
         text $ "Multiple cabal files found. Possible cabal files: \""
                ++ intercalate "\", \"" cfs ++"\"."
-    GMECabalStateFile csfe ->
-        gmCsfeDoc csfe
-    GMEStackBootrap msg ->
-        (text $ "Boostrapping stack project failed")
-          <+>: text msg
     GMEWrongWorkingDirectory projdir cdir ->
         (text $ "You must run ghc-mod in the project directory as returned by `ghc-mod root`.")
           <+> text "Currently in:" <+> showDoc cdir
@@ -169,7 +130,6 @@ ghcExceptionDoc (Panic msg) = vcat $ map text $ lines $ printf "\
 
 ghcExceptionDoc e = text $ showGhcException e ""
 
-
 liftMaybe :: MonadError e m => e -> m (Maybe a) -> m a
 liftMaybe e action = maybe (throwError e) return =<< action
 
@@ -183,7 +143,6 @@ infixr 0 `modifyError'`
 modifyError' :: MonadError e m => m a -> (e -> e) -> m a
 modifyError' = flip modifyError
 
-
 modifyGmError :: (MonadIO m, ExceptionMonad m)
               => (GhcModError -> GhcModError) -> m a -> m a
 modifyGmError f a = gcatch a $ \(ex :: GhcModError) -> liftIO $ throwIO (f ex)
diff --git a/Language/Haskell/GhcMod/Stack.hs b/Language/Haskell/GhcMod/Stack.hs
index 567fdda..b4bdfc0 100644
--- a/Language/Haskell/GhcMod/Stack.hs
+++ b/Language/Haskell/GhcMod/Stack.hs
@@ -86,4 +86,4 @@ readStack args = do
   lift $ flip gcatch (\(e :: IOError) -> exToErr e) $ do
     liftIO $ evaluate =<< readProc stack args ""
  where
-   exToErr = throw . GMEStackBootrap . show
+   exToErr = throw . GMEStackBootstrap . GMEString . show
diff --git a/Language/Haskell/GhcMod/Types.hs b/Language/Haskell/GhcMod/Types.hs
index 15ca68a..f20f92f 100644
--- a/Language/Haskell/GhcMod/Types.hs
+++ b/Language/Haskell/GhcMod/Types.hs
@@ -379,11 +379,11 @@ data GhcModError
   | GMECabalConfigure GhcModError
   -- ^ Configuring a cabal project failed.
 
-  | GMECabalFlags GhcModError
-  -- ^ Retrieval of the cabal configuration flags failed.
+  | GMEStackConfigure GhcModError
+  -- ^ Configuring a stack project failed.
 
-  | GMECabalComponent ChComponentName
-  -- ^ Cabal component could not be found
+  | GMEStackBootstrap GhcModError
+    -- ^ Bootstrapping @stack@ environment failed (process exited with failure)
 
   | GMECabalCompAssignment [(Either FilePath ModuleName, Set ChComponentName)]
   -- ^ Could not find a consistent component assignment for modules
@@ -398,12 +398,6 @@ data GhcModError
   | GMETooManyCabalFiles [FilePath]
   -- ^ Too many cabal files found.
 
-  | GMECabalStateFile GMConfigStateFileError
-    -- ^ Reading Cabal's state configuration file falied somehow.
-
-  | GMEStackBootrap String
-    -- ^ Bootstrapping @stack@ environment failed (process exited with failure)
-
   | GMEWrongWorkingDirectory FilePath FilePath
 
     deriving (Eq,Show,Typeable)
@@ -414,15 +408,6 @@ instance Error GhcModError where
 
 instance Exception GhcModError
 
-data GMConfigStateFileError
-  = GMConfigStateFileNoHeader
-  | GMConfigStateFileBadHeader
-  | GMConfigStateFileNoParse
-  | GMConfigStateFileMissing
---  | GMConfigStateFileBadVersion PackageIdentifier PackageIdentifier (Either ConfigStateFileError LocalBuildInfo)
-  deriving (Eq, Show, Read, Typeable)
-
-
 deriving instance Generic Version
 instance Serialize Version