diff --git a/env.hs b/Env.hs
similarity index 100%
rename from env.hs
rename to Env.hs
diff --git a/interpreter.hs b/Interpreter.hs
similarity index 98%
rename from interpreter.hs
rename to Interpreter.hs
index 5cdea05..245db75 100644
--- a/interpreter.hs
+++ b/Interpreter.hs
@@ -44,7 +44,6 @@ printOutputAndExit (Left err, _) = do
 printOutputAndExit (Right output, _) = do
                    putStr $ show output
                    exitSuccess
-                   ls
                    
 showTree :: (Show a, Print a) => Int -> a -> IO ()
 showTree v tree
diff --git a/jsinterpreter.hs b/JSInterpreter.hs
similarity index 100%
rename from jsinterpreter.hs
rename to JSInterpreter.hs
diff --git a/Makefile b/Makefile
index 8c45a53..f13532e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,6 @@
 all:
+	cabal update
+	cabal install mtl
 	happy -gca Parmyjs.y
 	alex -g Lexmyjs.x
 	ghc --make interpreter.hs -o interpreter
diff --git a/memory.hs b/Memory.hs
similarity index 97%
rename from memory.hs
rename to Memory.hs
index 4239086..aa9605c 100644
--- a/memory.hs
+++ b/Memory.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE AllowAmbiguousTypes #-}
 
 module Memory where
 
diff --git a/sys.hs b/Sys.hs
similarity index 100%
rename from sys.hs
rename to Sys.hs
diff --git a/types.hs b/Types.hs
similarity index 100%
rename from types.hs
rename to Types.hs