diff --git a/app/ghcup/BrickMain.hs b/app/ghcup/BrickMain.hs
index 66c851a..5afa2db 100644
--- a/app/ghcup/BrickMain.hs
+++ b/app/ghcup/BrickMain.hs
@@ -555,7 +555,35 @@ set' bs input@(_, ListResult {..}) = do
 
   let run =
         flip runReaderT settings
-          . runE @'[FileDoesNotExistError , NotInstalled , TagNotFound]
+          . runResourceT
+          . runE
+            @'[ AlreadyInstalled
+              , ArchiveResult
+              , UnknownArchive
+              , FileDoesNotExistError
+              , CopyError
+              , NoDownload
+              , NotInstalled
+              , BuildFailed
+              , TagNotFound
+              , DigestError
+              , ContentLengthError
+              , GPGError
+              , DownloadFailed
+              , DirNotEmpty
+              , NoUpdate
+              , TarDirDoesNotExist
+              , FileAlreadyExistsError
+              , ProcessError
+              , ToolShadowed
+              , UninstallFailed
+              , MergeFileTreeError
+              , NoCompatiblePlatform
+              , GHCup.Errors.ParseError
+              , UnsupportedSetupCombo
+              , DistroNotFound
+              , NoCompatibleArch
+              ]
 
   run (do
       case lTool of
@@ -563,7 +591,12 @@ set' bs input@(_, ListResult {..}) = do
         Cabal -> liftE $ setCabal lVer $> ()
         HLS   -> liftE $ setHLS lVer SetHLSOnly Nothing $> ()
         Stack -> liftE $ setStack lVer $> ()
-        GHCup -> pure ()
+        GHCup -> do
+          promptAnswer <- getUserPromptResponse "Switching GHCup versions is not supported.\nDo you want to install the latest version? [Y/N]: "
+          case promptAnswer of
+                PromptYes -> do
+                  void $ liftE $ upgradeGHCup Nothing False False
+                PromptNo -> pure ()
     )
     >>= \case
           VRight _ -> pure $ Right ()
diff --git a/lib-opt/GHCup/OptParse/Config.hs b/lib-opt/GHCup/OptParse/Config.hs
index 97cf23d..c04eac5 100644
--- a/lib-opt/GHCup/OptParse/Config.hs
+++ b/lib-opt/GHCup/OptParse/Config.hs
@@ -67,7 +67,6 @@ configP = subparser
       <> command "show" showP
       <> command "add-release-channel" addP
       )
-    <|> argsP -- add show for a single option
     <|> pure ShowConfig
  where
   initP = info (pure InitConfig) (progDesc "Write default config to ~/.ghcup/config.yaml")
@@ -193,10 +192,14 @@ config configCommand settings userConf keybindings runLogger = case configComman
           throwE $ ParseError "Empty values are not allowed"
         Nothing -> do
           usersettings <- decodeSettings k
+          when (usersettings == defaultUserSettings)
+            $ throwE $ ParseError ("Failed to parse setting (maybe typo?): " <> k)
           lift $ doConfig usersettings
           pure ()
         Just v -> do
           usersettings <- decodeSettings (k <> ": " <> v <> "\n")
+          when (usersettings == defaultUserSettings)
+            $ throwE $ ParseError ("Failed to parse key '" <> k <> "' with value '" <> v <> "' as user setting. Maybe typo?")
           lift $ doConfig usersettings
           pure ()
     case r of
@@ -204,7 +207,9 @@ config configCommand settings userConf keybindings runLogger = case configComman
       VLeft (V (JSONDecodeError e)) -> do
         runLogger $ logError $ "Error decoding config: " <> T.pack e
         pure $ ExitFailure 65
-      VLeft _ -> pure $ ExitFailure 65
+      VLeft e -> do
+        runLogger (logError $ T.pack $ prettyHFError e)
+        pure $ ExitFailure 65
 
   AddReleaseChannel force new -> do
     r <- runE @'[DuplicateReleaseChannel] $ do
diff --git a/lib-opt/GHCup/OptParse/Prefetch.hs b/lib-opt/GHCup/OptParse/Prefetch.hs
index 803457d..3550ab7 100644
--- a/lib-opt/GHCup/OptParse/Prefetch.hs
+++ b/lib-opt/GHCup/OptParse/Prefetch.hs
@@ -199,19 +199,19 @@ prefetch prefetchCommand runAppState runLogger =
           (v, _) <- liftE $ fromVersion mt GHC
           if pfGHCSrc
           then liftE $ fetchGHCSrc v pfCacheDir
-          else liftE $ fetchToolBindist (_tvVersion v) GHC pfCacheDir
+          else liftE $ fetchToolBindist v GHC pfCacheDir
       PrefetchCabal PrefetchOptions {pfCacheDir} mt   -> do
         forM_ pfCacheDir (liftIO . createDirRecursive')
         (v, _) <- liftE $ fromVersion mt Cabal
-        liftE $ fetchToolBindist (_tvVersion v) Cabal pfCacheDir
+        liftE $ fetchToolBindist v Cabal pfCacheDir
       PrefetchHLS PrefetchOptions {pfCacheDir} mt   -> do
         forM_ pfCacheDir (liftIO . createDirRecursive')
         (v, _) <- liftE $ fromVersion mt HLS
-        liftE $ fetchToolBindist (_tvVersion v) HLS pfCacheDir
+        liftE $ fetchToolBindist v HLS pfCacheDir
       PrefetchStack PrefetchOptions {pfCacheDir} mt   -> do
         forM_ pfCacheDir (liftIO . createDirRecursive')
         (v, _) <- liftE $ fromVersion mt Stack
-        liftE $ fetchToolBindist (_tvVersion v) Stack pfCacheDir
+        liftE $ fetchToolBindist v Stack pfCacheDir
       PrefetchMetadata -> do
         pfreq <- lift getPlatformReq
         _ <- liftE $ getDownloadsF pfreq
diff --git a/lib/GHCup.hs b/lib/GHCup.hs
index 74c55e8..827dd7d 100644
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@@ -100,7 +100,7 @@ fetchToolBindist :: ( MonadFail m
                     , MonadIO m
                     , MonadUnliftIO m
                     )
-                 => Version
+                 => GHCTargetVersion
                  -> Tool
                  -> Maybe FilePath
                  -> Excepts
@@ -113,7 +113,7 @@ fetchToolBindist :: ( MonadFail m
                       m
                       FilePath
 fetchToolBindist v t mfp = do
-  dlinfo <- liftE $ getDownloadInfo t v
+  dlinfo <- liftE $ getDownloadInfo' t v
   liftE $ downloadCached' dlinfo Nothing mfp
 
 
diff --git a/lib/GHCup/Download.hs b/lib/GHCup/Download.hs
index 5c833ac..73708ec 100644
--- a/lib/GHCup/Download.hs
+++ b/lib/GHCup/Download.hs
@@ -149,12 +149,16 @@ getDownloadsF pfreq@(PlatformRequest arch plat _) = do
       -> Excepts
            '[DownloadFailed, GPGError, DigestError, ContentLengthError, JSONError, FileDoesNotExistError]
            m (Either GHCupInfo Stack.SetupInfo)
-  dl' NewGHCupURL       = fmap Left $ liftE $ getBase @GHCupInfo ghcupURL
-  dl' NewStackSetupURL  = fmap Right $ liftE $ getBase @Stack.SetupInfo stackSetupURL
+  dl' NewGHCupURL       = fmap Left $ liftE (getBase ghcupURL) >>= liftE . decodeMetadata @GHCupInfo
+  dl' NewStackSetupURL  = fmap Right $ liftE (getBase stackSetupURL) >>= liftE . decodeMetadata @Stack.SetupInfo
   dl' (NewGHCupInfo gi) = pure (Left gi)
   dl' (NewSetupInfo si) = pure (Right si)
-  dl' (NewURI uri)      = catchE @JSONError (\(JSONDecodeError _) -> Right <$> getBase @Stack.SetupInfo uri)
-                            $ fmap Left $ getBase @GHCupInfo uri
+  dl' (NewURI uri)      = do
+                            base <- liftE $ getBase uri
+                            catchE @JSONError (\(JSONDecodeError _) -> do
+                                logDebug $ "Couldn't decode " <> T.pack base <> " as GHCupInfo, trying as SetupInfo: "
+                                Right <$> decodeMetadata @Stack.SetupInfo base)
+                              $ fmap Left $ decodeMetadata @GHCupInfo base
 
   fromStackSetupInfo :: MonadThrow m
                      => Stack.SetupInfo
@@ -201,7 +205,7 @@ etagsFile :: FilePath -> FilePath
 etagsFile = (<.> "etags")
 
 
-getBase :: forall j m env . ( MonadReader env m
+getBase :: forall m env . ( MonadReader env m
            , HasDirs env
            , HasSettings env
            , MonadFail m
@@ -209,10 +213,9 @@ getBase :: forall j m env . ( MonadReader env m
            , MonadCatch m
            , HasLog env
            , MonadMask m
-           , FromJSON j
            )
         => URI
-        -> Excepts '[DownloadFailed, GPGError, DigestError, ContentLengthError, JSONError, FileDoesNotExistError] m j
+        -> Excepts '[DownloadFailed, GPGError, DigestError, ContentLengthError] m FilePath
 getBase uri = do
   Settings { noNetwork, downloader, metaMode } <- lift getSettings
 
@@ -232,25 +235,8 @@ getBase uri = do
                $ uri
 
   -- if we didn't get a filepath from the download, use the cached yaml
-  actualYaml <- maybe (lift $ yamlFromCache uri) pure mYaml
-  lift $ logDebug $ "Decoding yaml at: " <> T.pack actualYaml
-
-  liftE
-    . onE_ (onError actualYaml)
-    . lEM' @_ @_ @'[JSONError] (\(displayException -> e) -> JSONDecodeError $ unlines [e, "Consider removing " <> actualYaml <> " manually."])
-    . liftIO
-    . Y.decodeFileEither
-    $ actualYaml
+  maybe (lift $ yamlFromCache uri) pure mYaml
  where
-  -- On error, remove the etags file and set access time to 0. This should ensure the next invocation
-  -- may re-download and succeed.
-  onError :: (MonadReader env m, HasLog env, MonadMask m, MonadCatch m, MonadIO m) => FilePath -> m ()
-  onError fp = do
-    let efp = etagsFile fp
-    handleIO (\e -> logWarn $ "Couldn't remove file " <> T.pack efp <> ", error was: " <> T.pack (displayException e))
-      (hideError doesNotExistErrorType $ rmFile efp)
-    liftIO $ hideError doesNotExistErrorType $ setAccessTime fp (posixSecondsToUTCTime (fromIntegral @Int 0))
-
   warnCache :: (MonadReader env m, HasLog env, MonadMask m, MonadCatch m, MonadIO m) => FilePath -> Downloader -> m ()
   warnCache s downloader' = do
     let tryDownloder = case downloader' of
@@ -322,6 +308,39 @@ getBase uri = do
 
       pure f
 
+decodeMetadata :: forall j m env .
+               ( MonadReader env m
+               , HasDirs env
+               , HasSettings env
+               , MonadFail m
+               , MonadIO m
+               , MonadCatch m
+               , HasLog env
+               , MonadMask m
+               , FromJSON j
+               )
+               => FilePath
+               -> Excepts '[JSONError, FileDoesNotExistError] m j
+decodeMetadata actualYaml = do
+  lift $ logDebug $ "Decoding yaml at: " <> T.pack actualYaml
+
+  liftE
+    . onE_ (onError actualYaml)
+    . lEM' @_ @_ @'[JSONError] (\(displayException -> e) -> JSONDecodeError $ unlines [e, "Consider removing " <> actualYaml <> " manually."])
+    . liftIO
+    . Y.decodeFileEither
+    $ actualYaml
+ where
+  -- On error, remove the etags file and set access time to 0. This should ensure the next invocation
+  -- may re-download and succeed.
+  onError :: (MonadReader env m, HasLog env, MonadMask m, MonadCatch m, MonadIO m) => FilePath -> m ()
+  onError fp = do
+    let efp = etagsFile fp
+    handleIO (\e -> logWarn $ "Couldn't remove file " <> T.pack efp <> ", error was: " <> T.pack (displayException e))
+      (hideError doesNotExistErrorType $ rmFile efp)
+    liftIO $ hideError doesNotExistErrorType $ setAccessTime fp (posixSecondsToUTCTime (fromIntegral @Int 0))
+
+
 getDownloadInfo :: ( MonadReader env m
                    , HasPlatformReq env
                    , HasGHCupInfo env
diff --git a/lib/GHCup/Errors.hs b/lib/GHCup/Errors.hs
index 367b23a..4ea2953 100644
--- a/lib/GHCup/Errors.hs
+++ b/lib/GHCup/Errors.hs
@@ -724,7 +724,7 @@ data InstallSetError = forall xs1 xs2 . (Show (V xs1), Pretty (V xs1), HFErrorPr
 
 instance Pretty InstallSetError where
   pPrint (InstallSetError reason1 reason2) =
-     text "Both installation and setting the tool failed. Install error was:"
+     text "Both installation and setting the tool failed.\nInstall error was:"
       <+> pPrint reason1
       <+> text "\nSet error was:"
       <+> pPrint reason2
diff --git a/lib/GHCup/Types.hs b/lib/GHCup/Types.hs
index 53b3c3c..3763623 100644
--- a/lib/GHCup/Types.hs
+++ b/lib/GHCup/Types.hs
@@ -398,7 +398,7 @@ data UserSettings = UserSettings
   , uPlatformOverride :: Maybe PlatformRequest
   , uMirrors     :: Maybe DownloadMirrors
   }
-  deriving (Show, GHC.Generic)
+  deriving (Show, GHC.Generic, Eq)
 
 defaultUserSettings :: UserSettings
 defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
@@ -459,7 +459,7 @@ data UserKeyBindings = UserKeyBindings
   , kShowAll      :: Maybe KeyCombination
   , kShowAllTools :: Maybe KeyCombination
   }
-  deriving (Show, GHC.Generic)
+  deriving (Show, GHC.Generic, Eq)
 
 data KeyBindings = KeyBindings
   { bUp              :: KeyCombination
diff --git a/lib/GHCup/Types/Stack.hs b/lib/GHCup/Types/Stack.hs
index 52cea72..84c3b45 100644
--- a/lib/GHCup/Types/Stack.hs
+++ b/lib/GHCup/Types/Stack.hs
@@ -50,7 +50,7 @@ instance FromJSON SetupInfo where
     siSevenzExe <- o .:? "sevenzexe-info"
     siSevenzDll <- o .:? "sevenzdll-info"
     siMsys2     <- o .:? "msys2"          .!= mempty
-    siGHCs      <- o .:? "ghc"            .!= mempty
+    siGHCs      <- o .: "ghc"
     siStack     <- o .:? "stack"          .!= mempty
     pure SetupInfo {..}