diff --git a/app/Gyehoek/CPS/Lower.hs b/app/Gyehoek/CPS/Lower.hs
index ab444a1..9a5e263 100644
--- a/app/Gyehoek/CPS/Lower.hs
+++ b/app/Gyehoek/CPS/Lower.hs
@@ -27,6 +27,7 @@ import Gyehoek.Scheme.Syntax (Lit(LitInt))
 import Text.Printf
 import qualified Data.Text as T
 import qualified Data.Vector.Strict as V
+import Data.IntMap.Strict (IntMap)
 
 
 type Emit = Writer (Vector Text)
@@ -64,6 +65,18 @@ tshow = T.pack . show
 
 
 
+data Module = MkModule
+  { funcs :: IntMap Func
+  }
+  deriving (Show, Generic)
+
+data Func = MkFunc
+  { code :: Text
+  }
+  deriving (Show, Generic)
+
+
+
 lowerVal :: Env -> Val -> Vector Text
 
 lowerVal g (ValLit l) =
diff --git a/app/Main.hs b/app/Main.hs
index 22431bd..dbe7850 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -8,7 +8,7 @@ module Main
 import Gyehoek.Options
 import qualified Data.Text.IO as TIO
 import Data.Text (Text)
-import Prelude hiding (readFile, (.),id)
+import Prelude hiding (readFile)
 import Options.Applicative
 import Control.Lens
 import Data.Generics.Labels
@@ -50,8 +50,16 @@ hGetContents h = T.decodeUtf8 <$> FB.hGetContents h
 readFile :: FileSystem :> es => FilePath -> Eff es Text
 readFile f = FS.withFile f FS.ReadMode hGetContents
 
+withFile
+  :: (FileSystem :> es)
+  => FilePath -> FS.IOMode -> (Handle -> Eff es a) -> Eff es a
+withFile "-" _ k = k FS.stdin
+withFile f m k   = FS.withFile f m k
+
 readScm :: FileSystem :> es => FilePath -> Eff es (List Scm.Exp)
-readScm f = (Sexp.parseSexps f <$> readFile f) >>= either error pure
+readScm f =
+  withFile f FS.ReadMode $ \h ->
+    Sexp.parseSexps f <$> hGetContents h >>= either error pure
 
 driver
   :: (GenSym :> es, FileSystem :> es, IOE :> es)