Fix

node_modules/shiki/samples/haskell.sample

@@ -0,0 +1,23 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+
+import Yesod
+
+data WebApp = WebApp
+
+instance Yesod WebApp
+
+mkYesod "WebApp" [parseRoutes|
+  / HomeR GET
+|]
+
+getHomeR = defaultLayout [whamlet|
+  <div>Hello, world!
+|]
+
+main = warpEnv WebApp
+
+{-# From https://www.schoolofhaskell.com/user/eriks/Simple%20examples }