EXTRA_DIST for Makefile.am repeats the directory name

I'm using EXTRA_DIST within a Makefile.am to copy some folders: EXTRA_DIST = input/

The problem is that it repeats the directory name input/input/

Do you know开发者_StackOverflow中文版 any solution for this problem? is this a bug of automake?

---

I have found the solution. With: "EXTRA_DIST = input" instead of "EXTRA_DIST = input/" works fine