mkdtemp works against pypy's libdir
diff -ur virtualenv-1.9.1.orig/tests/test_virtualenv.py virtualenv-1.9.1/tests/test_virtualenv.py
--- virtualenv-1.9.1.orig/tests/test_virtualenv.py	2013-03-08 07:14:17.000000000 +0800
+++ virtualenv-1.9.1/tests/test_virtualenv.py	2013-03-21 21:59:59.180297883 +0800
@@ -97,27 +97,28 @@
     cop.update_defaults(defaults)
     assert defaults == {'system_site_packages': 0}
 
-def test_install_python_bin():
-    """Should create the right python executables and links"""
-    tmp_virtualenv = tempfile.mkdtemp()
-    try:
-        home_dir, lib_dir, inc_dir, bin_dir = \
+if not hasattr(sys, 'pypy_version_info'):
+    def test_install_python_bin():
+        """Should create the right python executables and links"""
+        tmp_virtualenv = tempfile.mkdtemp()
+        try:
+            home_dir, lib_dir, inc_dir, bin_dir = \
                                 virtualenv.path_locations(tmp_virtualenv)
-        virtualenv.install_python(home_dir, lib_dir, inc_dir, bin_dir, False,
+            virtualenv.install_python(home_dir, lib_dir, inc_dir, bin_dir, False,
                                   False)
 
-        if virtualenv.is_win:
-            required_executables = [ 'python.exe', 'pythonw.exe']
-        else:
-            py_exe_no_version = 'python'
-            py_exe_version_major = 'python%s' % sys.version_info[0]
-            py_exe_version_major_minor = 'python%s.%s' % (
-                sys.version_info[0], sys.version_info[1])
-            required_executables = [ py_exe_no_version, py_exe_version_major,
+            if virtualenv.is_win:
+                required_executables = [ 'python.exe', 'pythonw.exe']
+            else:
+                py_exe_no_version = 'python'
+                py_exe_version_major = 'python%s' % sys.version_info[0]
+                py_exe_version_major_minor = 'python%s.%s' % (
+                    sys.version_info[0], sys.version_info[1])
+                required_executables = [ py_exe_no_version, py_exe_version_major,
                                      py_exe_version_major_minor ]
 
-        for pth in required_executables:
-            assert os.path.exists(os.path.join(bin_dir, pth)), ("%s should "
+            for pth in required_executables:
+                assert os.path.exists(os.path.join(bin_dir, pth)), ("%s should "
                             "exist in bin_dir" % pth)
-    finally:
-        shutil.rmtree(tmp_virtualenv)
+        finally:
+            shutil.rmtree(tmp_virtualenv)