diff -r 63183596db79 setup.py
--- a/setup.py	Fri Jan 22 13:17:41 2016 -0800
+++ b/setup.py	Mon Jan 25 16:16:33 2016 +0000
@@ -36,11 +36,19 @@
 disabled_module_list = []
 
 def add_dir_to_list(dirlist, dir):
-    """Add the directory 'dir' to the list 'dirlist' (at the front) if
+    """Add the directory 'dir' to the list 'dirlist' (after any relative
+    directories) if:
+
     1) 'dir' is not already in 'dirlist'
-    2) 'dir' actually exists, and is a directory."""
-    if dir is not None and os.path.isdir(dir) and dir not in dirlist:
-        dirlist.insert(0, dir)
+    2) 'dir' actually exists, and is a directory.
+    """
+    if dir is None or not os.path.isdir(dir) or dir in dirlist:
+        return
+    for i, path in enumerate(dirlist):
+        if not os.path.isabs(path):
+            dirlist.insert(i + 1, dir)
+            return
+    dirlist.insert(0, dir)
 
 def macosx_sdk_root():
     """