--- firefox-52.9.0esr/python/mozbuild/mozbuild/virtualenv.py~	2013-05-11 21:19:23.000000000 +0200
+++ firefox-52.9.0esr/python/mozbuild/mozbuild/virtualenv.py	2013-05-14 22:51:32.136719267 +0200
@@ -66,8 +66,7 @@ class VirtualenvManager(object):
     @property
     def virtualenv_script_path(self):
         """Path to virtualenv's own populator script."""
-        return os.path.join(self.topsrcdir, 'python', 'virtualenv',
-            'virtualenv.py')
+        return '/usr/bin/virtualenv-2'
 
     @property
     def bin_path(self):
@@ -390,15 +389,6 @@ class VirtualenvManager(object):
             for package in packages:
                 handle_package(package)
 
-            sitecustomize = os.path.join(
-                os.path.dirname(os.__file__), 'sitecustomize.py')
-            with open(sitecustomize, 'w') as f:
-                f.write(
-                    '# Importing mach_bootstrap has the side effect of\n'
-                    '# installing an import hook\n'
-                    'import mach_bootstrap\n'
-                )
-
         finally:
             os.environ.pop('MACOSX_DEPLOYMENT_TARGET', None)