https://bugs.debian.org/790287
https://code.google.com/p/sunpinyin/issues/detail?id=327

Author: Guo Yixuan <culu.gyx@gmail.com>

--- a/man/SConscript
+++ b/man/SConscript
@@ -1,7 +1,7 @@
 import os
 Import('env')
 
-pod2man = Builder(action = 'pod2man < $SOURCE > $TARGET')
+pod2man = Builder(action = 'pod2man $SOURCE $TARGET')
 env.Append(BUILDERS = {'Man': pod2man})
 
 env.Man('mmseg.1', 'mmseg.pod')