diff -Naur a/src/tools/depbuild.cpp b/src/tools/depbuild.cpp
--- a/src/tools/depbuild.cpp	2012-06-04 19:17:54.135181658 +0300
+++ b/src/tools/depbuild.cpp	2012-06-04 19:48:51.138264517 +0300
@@ -25,6 +25,7 @@
 #include <string>
 #include <cstdio>
 #include <cstdlib>
+#include <unistd.h>
 using namespace std;
 
 #include "fileutil.h"