diff -Nur livecd-tools-21.1.old/imgcreate/live.py livecd-tools-21.1/imgcreate/live.py
--- livecd-tools-21.1.old/imgcreate/live.py	2014-07-03 13:31:20.000000000 +0400
+++ livecd-tools-21.1/imgcreate/live.py	2014-07-03 13:32:47.241941724 +0400
@@ -726,7 +726,7 @@
         if not self._efiarch:
             # for most things, we want them named boot$efiarch
             efiarch = {"i386": "IA32", "x86_64": "X64"}
-            self._efiarch = efiarch[rpmUtils.arch.getBaseArch()]
+            self._efiarch = efiarch[getBaseArch()]
         return self._efiarch
 
     def __copy_efi_files(self, isodir):