Do not rely on NODE_PATH env.

src/atom.coffee

@@ -148,6 +148,9 @@ class Atom extends Model
     {devMode, resourcePath} = @getLoadSettings()
     configDirPath = @getConfigDirPath()
 
+    # Add 'src/exports' to module search path.
+    require('module').globalPaths.push(path.resolve(resourcePath, 'exports'))
+
     @config = new Config({configDirPath, resourcePath})
     @keymap = new Keymap({configDirPath, resourcePath})
     @packages = new PackageManager({devMode, configDirPath, resourcePath})

src/browser/atom-window.coffee

@@ -21,12 +21,7 @@ class AtomWindow
     {@resourcePath, pathToOpen, initialLine, @isSpec, @exitWhenDone} = settings
     global.atomApplication.addWindow(this)
 
-    @setupNodePath(@resourcePath)
     @browserWindow = new BrowserWindow show: false, title: 'Atom', icon: @constructor.iconPath
-    @browserWindow.restart = _.wrap _.bind(@browserWindow.restart, @browserWindow), (restart) =>
-      @setupNodePath(@resourcePath)
-      restart()
-
     @handleEvents()
 
     loadSettings = _.extend({}, settings)
@@ -49,9 +44,6 @@ class AtomWindow
 
     @openPath(pathToOpen, initialLine)
 
-  setupNodePath: (resourcePath) ->
-    process.env['NODE_PATH'] = path.resolve(resourcePath, 'exports')
-
   getUrl: (loadSettingsObj) ->
     # Ignore the windowState when passing loadSettings via URL, since it could
     # be quite large.