diff --git a/lib/cli.js b/lib/cli.js
index 1dc7f70..2b29e12 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -5,13 +5,16 @@ var commander = require('commander');
 var continuation = require('../continuation');
 var meta = require('../package.json');
 
+try {var coffeescript = require('coffee-script');} catch (err) {}
+try {var livescript = require('LiveScript');} catch (err) {}
+
 var options = {
   explicit: false,
   sourceMap: true,
   verbose: false,
   cache: false,
   force: false,
-  indent: '  ',
+  indent: '  '
 };
 
 var cacheDefaultPath = '/tmp/continuation';
@@ -65,7 +68,7 @@ var main = exports.main = function () {
   if (print) {
     outputCode(filename, code);
   } else {
-    runCode(code, filename);
+    executeTopModule(code, filename);
   }
 };
 
@@ -87,54 +90,52 @@ var outputCode = function (originalFilename, code) {
   }
 };
 
-var runCode = function (code, filename) {
+var executeTopModule = function (code, filename) {
   //Set current module information
   var mainModule = require.main;
   mainModule.filename = filename;
   mainModule.moduleCache = {};
   mainModule.children = [];
   mainModule.paths = calculatePaths(filename);
-  
   //Register require handler
-  require.extensions['.js'] = execute;
-  require.extensions['.coffee'] = execute;
-  require.extensions['.ls'] = execute;
-  
+  registerRequire();
   //Generate program arguments
   var args = commander.args.slice(1);
   process.argv = [process.argv[0], filename].concat(args);
-  
   //Run
   mainModule._compile(code, filename);
 };
 
+var registerRequire = function() {
+  require.extensions['.ls'] = execute;
+  require.extensions['.js'] = execute;
+  require.extensions['.coffee'] = execute;
+};
+
 var compile = function (filename) {
-  
-  if (options.verbose) {
-    console.error('Load ' + filename);
-  }
-  
+  var code;
   if (options.cache) {
     code = readCache(filename);
     if (code !== null) {
-      if (options.verbose) {
-        console.error('Cache hit');
-      }
       return code;
     }
   }
-  
-  var code = fs.readFileSync(filename, 'utf-8');
-  
   try {
+    code = fs.readFileSync(filename, 'utf-8');
     var ext = path.extname(filename);
     if (ext === '.coffee') {
       //Coffee-script support
-      coffeescript = require('coffee-script');
+      if (!coffeescript) {
+        console.error('CoffeeScript not found. Use: npm install -g coffee-script');
+        process.exit(-1);
+      }
       code = coffeescript.compile(code);
     } else if (ext === '.ls') {
       //LiveScript support
-      var livescript = require('LiveScript');
+      if (!livescript) {
+        console.error('LiveScript not found. Use: npm install -g LiveScript');
+        process.exit(-1);
+      }
       code = livescript.compile(code);
     }
     code = continuation.compile(code, options);
@@ -143,14 +144,12 @@ var compile = function (filename) {
     console.error(err.stack);
     process.exit(-1);
   }
-  
   if (options.cache) {
     if (options.verbose) {
-      console.error('Cache updated');
+      console.error('Updated ' + filename);
     }
     writeCache(filename, code);
   }
-  
   return code;
 };
 
@@ -185,7 +184,7 @@ var readCache = function (filename) {
   
   var stat = fs.lstatSync(cachedFilePath);
   var cacheMtime = stat.mtime;
-  var stat = fs.lstatSync(filename);
+  stat = fs.lstatSync(filename);
   var sourceMtime = stat.mtime;
   
   if (sourceMtime > cacheMtime) {