Index: src/common/sandbox.c
--- src/common/sandbox.c.orig
+++ src/common/sandbox.c
@@ -5,6 +5,8 @@
 #include <time.h>
 #include <unistd.h>
 #include <grp.h> // initgroups() on Linux
+#include <stdio.h>
+#include <unistd.h>
 #include <pwd.h>
 #include "sandbox.h"
 
