--- nsis-2.46-src.old/Source/util.h 2009-03-28 09:47:26.000000000 +0000
+++ nsis-2.46-src/Source/util.h 2012-01-16 12:22:14.967416817 +0000
@@ -17,6 +17,8 @@
#ifndef _UTIL_H_
#define _UTIL_H_
+#include <unistd.h>
+
#include <string> // for std::string
#include "boost/scoped_ptr.hpp" // for boost::scoped_ptr