diff --git a/app/HTML.hs b/app/HTML.hs
new file mode 100644
index 0000000..1a92e64
--- /dev/null
+++ b/app/HTML.hs
@@ -0,0 +1,9 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HTML (compileToHTML) where
+
+import Data.Text
+import IR
+
+compileToHTML :: Document -> Text
+compileToHTML = const ""
diff --git a/app/Main.hs b/app/Main.hs
index 0d5305b..e2c7b63 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -148,10 +148,9 @@ rss =
 -- Shake.putInfo $ "Built " <> target
 
 readPost :: FilePath -> Action Post
-readPost postPath = do
-  case FP.takeExtension postPath of
-    ".md" -> readMarkdownPost postPath
-    _ -> error $ "unknown file extension for file" <> postPath
+readPost postPath = case FP.takeExtension postPath of
+  ".md" -> readMarkdownPost postPath
+  _ -> error $ "unknown file extension for file" <> postPath
 
 readMarkdownPost :: FilePath -> Action Post
 readMarkdownPost postPath = do