Index: yara/libyara/proc.c
===================================================================
--- yara.orig/libyara/proc.c	2014-03-23 15:25:17.137680593 +0100
+++ yara/libyara/proc.c	2014-03-23 15:25:35.221219042 +0100
@@ -157,7 +157,7 @@
 #define PTRACE_DETACH PT_DETACH
 #endif
 
-#if defined(__MACH__)
+#if defined(__MACH__) && !defined(__gnu_hurd)
 
 #include <mach/mach.h>
 #include <mach/mach_vm.h>
