diff -r f48f302f54aa Lib/uuid.py
--- a/Lib/uuid.py	Sun Dec 01 11:04:17 2013 +0100
+++ b/Lib/uuid.py	Sun Dec 01 17:10:17 2013 +0200
@@ -312,10 +312,10 @@
             return int((self.int >> 76) & 0xf)
 
 def _find_mac(command, args, hw_identifiers, get_index):
-    import os
-    for dir in ['', '/sbin/', '/usr/sbin']:
+    import os, shutil
+    for dir in ['', '/sbin', '/usr/sbin']:
         executable = os.path.join(dir, command)
-        if not os.path.exists(executable):
+        if shutil.which(executable) is None:
             continue
 
         try: