--- Lib/site.py
+++ Lib/site.py
@@ -173,7 +173,7 @@
 
 def addsitepackages(known_paths):
     """Add site-packages (and possibly site-python) to sys.path"""
-    prefixes = [sys.prefix]
+    prefixes = [sys.prefix, '/usr/local']
     if sys.exec_prefix != sys.prefix:
         prefixes.append(sys.exec_prefix)
     for prefix in prefixes: