Work around an easy_install bug that should be fixed in b3.

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@68517 62d5b8a3-27da-0310-9561-8e5933582275

src/zc/buildout/easy_install.py

@@ -22,6 +22,7 @@ $Id$
 
 # XXX needs doctest
 
+import sys
 import setuptools.command.easy_install
 import pkg_resources
 import setuptools.package_index
@@ -45,6 +46,11 @@ def install(spec, dest, links=(), **kw):
         )
     easy.finalize_options()
 
+    # hack around easy_install bug 
+    easy.local_index = pkg_resources.Environment(
+        easy.shadow_path + sys.path)
+
+
     old_warn = distutils.log.warn
     distutils.log.warn = lambda *a, **k: None