diff --git a/pip/req.py b/pip/req.py
index e487edbd902..7cb5a6b8b9b 100644
--- a/pip/req.py
+++ b/pip/req.py
@@ -245,14 +245,16 @@ def run_egg_info(self, force_root_egg_info=False):
     _run_setup_py = """
 __file__ = __SETUP_PY__
 from setuptools.command import egg_info
+import pkg_resources
+import os
 def replacement_run(self):
     self.mkpath(self.egg_info)
     installer = self.distribution.fetch_build_egg
-    for ep in egg_info.iter_entry_points('egg_info.writers'):
+    for ep in pkg_resources.iter_entry_points('egg_info.writers'):
         # require=False is the change we're making:
         writer = ep.load(require=False)
         if writer:
-            writer(self, ep.name, egg_info.os.path.join(self.egg_info,ep.name))
+            writer(self, ep.name, os.path.join(self.egg_info,ep.name))
     self.find_sources()
 egg_info.egg_info.run = replacement_run
 exec(compile(open(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
diff --git a/tests/packages/HackedEggInfo/setup.py b/tests/packages/HackedEggInfo/setup.py
new file mode 100755
index 00000000000..c34b57c4bc5
--- /dev/null
+++ b/tests/packages/HackedEggInfo/setup.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+from setuptools import setup
+from setuptools.command import egg_info as orig_egg_info
+
+class egg_info (orig_egg_info.egg_info):
+    def run(self):
+        orig_egg_info.egg_info.run(self)
+
+
+setup(
+    name = "hackedegginfo",
+    version = '0.0.0',
+    cmdclass = {'egg_info':egg_info },
+    zip_safe = False,
+)
+
diff --git a/tests/test_basic.py b/tests/test_basic.py
index c27e28fd13b..a49824abfb4 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -376,6 +376,16 @@ def test_install_with_pax_header():
     run_pip('install', 'paxpkg.tar.bz2', cwd=run_from)
 
 
+def test_install_with_hacked_egg_info():
+    """
+    test installing a package which defines its own egg_info class
+    """
+    reset_env()
+    run_from = abspath(join(here, 'packages', 'HackedEggInfo'))
+    result = run_pip('install', '.', cwd=run_from)
+    assert 'Successfully installed hackedegginfo\n' in result.stdout
+
+
 def test_install_using_install_option_and_editable():
     """
     Test installing a tool using -e and --install-option