--- a/Makefile	Wed Jul 03 21:49:43 2013 +0900
+++ b/Makefile	Wed Jul 03 21:50:20 2013 +0900
@@ -10,6 +10,8 @@
 PURE=
 PYFILES:=$(shell find mercurial hgext doc -name '*.py')
 DOCFILES=mercurial/help/*.txt
+export LANGUAGE=C
+export LC_ALL=C
 
 # Set this to e.g. "mingw32" to use a non-default compiler.
 COMPILER=