diff --git a/lib/coffee-script/coffee-script.js b/lib/coffee-script/coffee-script.js
index 38ae9764..3dd34f4b 100644
--- a/lib/coffee-script/coffee-script.js
+++ b/lib/coffee-script/coffee-script.js
@@ -1,5 +1,5 @@
 (function() {
-  var Lexer, RESERVED, compile, fs, lexer, parser, path, _ref;
+  var Lexer, RESERVED, compile, fs, lexer, parser, path, vm, _ref;
   var __hasProp = Object.prototype.hasOwnProperty;
 
   fs = require('fs');
@@ -10,6 +10,8 @@
 
   parser = require('./parser').parser;
 
+  vm = require('vm');
+
   if (require.extensions) {
     require.extensions['.coffee'] = function(module, filename) {
       var content;
@@ -74,14 +76,13 @@
     var Module, Script, js, k, o, r, sandbox, v, _i, _len, _module, _ref2, _ref3, _require;
     if (options == null) options = {};
     if (!(code = code.trim())) return;
-    Script = require('vm').Script;
+    Script = vm.Script;
     if (Script) {
-      sandbox = Script.createContext();
-      sandbox.global = sandbox.root = sandbox.GLOBAL = sandbox;
       if (options.sandbox != null) {
-        if (options.sandbox instanceof sandbox.constructor) {
+        if (options.sandbox instanceof Script.createContext().constructor) {
           sandbox = options.sandbox;
         } else {
+          sandbox = Script.createContext();
           _ref2 = options.sandbox;
           for (k in _ref2) {
             if (!__hasProp.call(_ref2, k)) continue;
@@ -89,14 +90,17 @@
             sandbox[k] = v;
           }
         }
+        sandbox.global = sandbox.root = sandbox.GLOBAL = sandbox;
+      } else {
+        sandbox = global;
       }
       sandbox.__filename = options.filename || 'eval';
       sandbox.__dirname = path.dirname(sandbox.__filename);
-      if (!(sandbox.module || sandbox.require)) {
+      if (!(sandbox !== global || sandbox.module || sandbox.require)) {
         Module = require('module');
         sandbox.module = _module = new Module(options.modulename || 'eval');
         sandbox.require = _require = function(path) {
-          return Module._load(path, _module);
+          return Module._load(path, _module, true);
         };
         _module.filename = sandbox.__filename;
         _ref3 = Object.getOwnPropertyNames(require);
@@ -118,10 +122,10 @@
     }
     o.bare = true;
     js = compile(code, o);
-    if (Script) {
-      return Script.runInContext(js, sandbox);
+    if (sandbox === global) {
+      return vm.runInThisContext(js);
     } else {
-      return eval(js);
+      return vm.runInContext(js, sandbox);
     }
   };
 
diff --git a/lib/coffee-script/repl.js b/lib/coffee-script/repl.js
index 6374a89e..b936a9b5 100644
--- a/lib/coffee-script/repl.js
+++ b/lib/coffee-script/repl.js
@@ -1,5 +1,5 @@
 (function() {
-  var ACCESSOR, CoffeeScript, Module, REPL_PROMPT, REPL_PROMPT_CONTINUATION, SIMPLEVAR, Script, autocomplete, backlog, completeAttribute, completeVariable, enableColours, error, g, getCompletions, inspect, nonContextGlobals, readline, repl, run, sandbox, stdin, stdout, _i, _len;
+  var ACCESSOR, CoffeeScript, Module, REPL_PROMPT, REPL_PROMPT_CONTINUATION, SIMPLEVAR, Script, autocomplete, backlog, completeAttribute, completeVariable, enableColours, error, getCompletions, inspect, readline, repl, run, stdin, stdout;
 
   CoffeeScript = require('./coffee-script');
 
@@ -31,17 +31,6 @@
 
   backlog = '';
 
-  sandbox = Script.createContext();
-
-  nonContextGlobals = ['Buffer', 'console', 'process', 'setInterval', 'clearInterval', 'setTimeout', 'clearTimeout'];
-
-  for (_i = 0, _len = nonContextGlobals.length; _i < _len; _i++) {
-    g = nonContextGlobals[_i];
-    sandbox[g] = global[g];
-  }
-
-  sandbox.global = sandbox.root = sandbox.GLOBAL = sandbox;
-
   run = function(buffer) {
     var code, returnValue, _;
     if (!buffer.toString().trim() && !backlog) {
@@ -58,14 +47,13 @@
     repl.setPrompt(REPL_PROMPT);
     backlog = '';
     try {
-      _ = sandbox._;
+      _ = global._;
       returnValue = CoffeeScript.eval("_=(" + code + "\n)", {
-        sandbox: sandbox,
         filename: 'repl',
         modulename: 'repl'
       });
       if (returnValue === void 0) {
-        sandbox._ = _;
+        global._ = _;
       } else {
         process.stdout.write(inspect(returnValue, false, 2, enableColours) + '\n');
       }
@@ -88,7 +76,7 @@
     if (match = text.match(ACCESSOR)) {
       all = match[0], obj = match[1], prefix = match[2];
       try {
-        val = Script.runInContext(obj, sandbox);
+        val = Script.runInThisContext(obj);
       } catch (error) {
         return;
       }
@@ -101,13 +89,13 @@
     var completions, free, keywords, possibilities, r, vars, _ref;
     free = (_ref = text.match(SIMPLEVAR)) != null ? _ref[1] : void 0;
     if (free != null) {
-      vars = Script.runInContext('Object.getOwnPropertyNames(this)', sandbox);
+      vars = Script.runInThisContext('Object.getOwnPropertyNames(this)');
       keywords = (function() {
-        var _j, _len2, _ref2, _results;
+        var _i, _len, _ref2, _results;
         _ref2 = CoffeeScript.RESERVED;
         _results = [];
-        for (_j = 0, _len2 = _ref2.length; _j < _len2; _j++) {
-          r = _ref2[_j];
+        for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
+          r = _ref2[_i];
           if (r.slice(0, 2) !== '__') _results.push(r);
         }
         return _results;
@@ -119,10 +107,10 @@
   };
 
   getCompletions = function(prefix, candidates) {
-    var el, _j, _len2, _results;
+    var el, _i, _len, _results;
     _results = [];
-    for (_j = 0, _len2 = candidates.length; _j < _len2; _j++) {
-      el = candidates[_j];
+    for (_i = 0, _len = candidates.length; _i < _len; _i++) {
+      el = candidates[_i];
       if (el.indexOf(prefix) === 0) _results.push(el);
     }
     return _results;