gistfile1.txt

--- virtualenv.orig 2011-04-26 20:27:02.557885000 -0700
+++ virtualenv.py   2011-04-26 21:49:58.111075000 -0700
@@ -394,6 +394,14 @@
         # Some bad symlink in the src
         logger.warn('Cannot find file %s (bad symlink)', src)
         return
+    if os.path.isdir(dest):
+        logger.debug('Directory %s already exists', dest)
+        logger.indent += 2
+        try:
+            for fn in os.listdir(src):
+                copyfile(join(src, fn), join(dest, fn), symlink)
+        finally:
+            logger.indent -= 2
     if os.path.exists(dest):
         logger.debug('File %s already exists', dest)
         return
@@ -884,7 +892,7 @@
 
 
 def change_prefix(filename, dst_prefix):
-    prefixes = [sys.prefix]
+    prefixes = [sys.prefix, sys.exec_prefix]
 
     if sys.platform == "darwin":
         prefixes.extend((
@@ -1004,8 +1012,14 @@
             exec_dir = join(sys.exec_prefix, 'Lib')
         else:
             exec_dir = join(sys.exec_prefix, 'lib', py_version)
-        for fn in os.listdir(exec_dir):
-            copyfile(join(exec_dir, fn), join(lib_dir, fn))
+        logger.debug('Exec dir %s', exec_dir)
+        logger.indent += 2
+        try:
+            for fn in os.listdir(exec_dir):
+                if fn != 'site-packages':
+                    copyfile(join(exec_dir, fn), join(lib_dir, fn))
+        finally:
+            logger.indent -= 2
 
     if is_jython:
         # Jython has either jython-dev.jar and javalib/ dir, or just