text: --- ./src/liolib.c.orig	2013-01-05 22:46:54.000000000 +0100
  +++ ./src/liolib.c	2013-01-05 22:47:32.000000000 +0100
  @@ -19,6 +19,7 @@
   #include <stdio.h>
   #include <stdlib.h>
   #include <string.h>
  +#include <unistd.h>
   
   #define liolib_c
   #define LUA_LIB
  