Implement support for nightlies, wrt #824

app/ghcup/Main.hs

@@ -240,7 +240,7 @@ Report bugs at <https://github.com/haskell/ghcup-hs/issues>|]
                   _
                     | Just False <- optVerbose -> pure ()
                     | otherwise -> lookupEnv "GHCUP_SKIP_UPDATE_CHECK" >>= \case
-                         Nothing -> void . flip runReaderT s' . runE @'[TagNotFound, NextVerNotFound, NoToolVersionSet] $ do
+                         Nothing -> void . flip runReaderT s' . runE @'[TagNotFound, DayNotFound, NextVerNotFound, NoToolVersionSet] $ do
                            newTools <- lift checkForUpdates
                            forM_ newTools $ \newTool@(t, l) -> do
                              -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/283
@@ -335,6 +335,7 @@ Report bugs at <https://github.com/haskell/ghcup-hs/issues>|]
                     -> (Tool, Version)
                     -> Excepts
                          '[ TagNotFound
+                          , DayNotFound
                           , NextVerNotFound
                           , NoToolVersionSet
                           ] m Bool
@@ -370,6 +371,7 @@ Report bugs at <https://github.com/haskell/ghcup-hs/issues>|]
        -> Version
        -> Excepts
             '[ TagNotFound
+             , DayNotFound
              , NextVerNotFound
              , NoToolVersionSet
              ] m Bool