diff --git a/regressions/common.h b/regressions/common.h
index ee6ce83..eccb853 100644
--- a/regressions/common.h
+++ b/regressions/common.h
@@ -37,7 +37,6 @@
 #elif defined(__MACH__)
 #include <mach/mach.h>
 #include <mach/thread_policy.h>
-#include <unistd.h>
 #endif
 
 #if defined(_WIN32)
@@ -150,13 +149,13 @@ common_alarm(void (*sig_handler)(int), void *alarm_event, unsigned int duration)
 #ifndef SECOND_TIMER
 #define	SECOND_TIMER 10000000
 #endif
-#define	COMMON_ALARM_DECLARE_GLOBAL(alarm_event_name, flag_name)				\
-static HANDLE common_win_alarm_timer;								\
-static HANDLE alarm_event_name;									\
-static LARGE_INTEGER common_alarm_timer_length;							\
+#define	COMMON_ALARM_DECLARE_GLOBAL(prefix, alarm_event_name, flag_name)			\
+static HANDLE prefix##_common_win_alarm_timer;							\
+static HANDLE prefix##_alarm_event_name;							\
+static LARGE_INTEGER prefix##_common_alarm_timer_length;					\
 												\
 static void CALLBACK										\
-common_win_alarm_handler(LPVOID arg, DWORD timer_low_value, DWORD timer_high_value)		\
+prefix##_common_win_alarm_handler(LPVOID arg, DWORD timer_low_value, DWORD timer_high_value)	\
 {												\
 	(void)arg;										\
 	(void)timer_low_value;									\
@@ -166,7 +165,7 @@ common_win_alarm_handler(LPVOID arg, DWORD timer_low_value, DWORD timer_high_val
 }												\
 												\
 static void *											\
-common_win_alarm(void *unused)									\
+prefix##_common_win_alarm(void *unused)								\
 {												\
 	(void)unused;										\
 	bool timer_success = false;								\
@@ -183,28 +182,28 @@ common_win_alarm(void *unused)									\
 	return NULL;										\
 }
 
-#define	COMMON_ALARM_DECLARE_LOCAL(alarm_event_name, local_name)	\
-	int64_t common_alarm_tl_#local_name;				\
-	pthread_t common_win_alarm_thread_#local_name;
-
-#define	COMMON_ALARM_INIT(alarm_event_name, duration, local_name) 	\
-	common_alarm_tl_#local_name = -1 * (duration) * SECOND_TIMER;	\
-	common_alarm_timer_length.LowPart = (DWORD) (tl & 0xFFFFFFFF);	\
-	common_alarm_timer_length.HighPart = (LONG) (tl >> 32);		\
-	alarm_event_name = CreateEvent(NULL, false, false, NULL);	\
-	assert(alarm_event_name != NULL);				\
-	common_win_alarm_timer = CreateWaitableTimer(NULL, true, NULL);	\
-	assert(common_win_alarm_timer != NULL);				\
-	if (pthread_create(&common_win_alarm_thread_#local_name,	\
-			   NULL,					\
-			   common_win_alarm,				\
-			   NULL) != 0)					\
+#define	COMMON_ALARM_DECLARE_LOCAL(prefix, alarm_event_name)	\
+	int64_t prefix##_common_alarm_tl;			\
+	pthread_t prefix##_common_win_alarm_thread;
+
+#define	COMMON_ALARM_INIT(prefix, alarm_event_name, duration) 				\
+	prefix##_common_alarm_tl = -1 * (duration) * SECOND_TIMER;			\
+	prefix##_common_alarm_timer_length.LowPart = (DWORD) (tl & 0xFFFFFFFF);		\
+	prefix##_common_alarm_timer_length.HighPart = (LONG) (tl >> 32);		\
+	prefix##_alarm_event_name = CreateEvent(NULL, false, false, NULL);		\
+	assert(prefix##_alarm_event_name != NULL);					\
+	prefix##_common_win_alarm_timer = CreateWaitableTimer(NULL, true, NULL);	\
+	assert(prefix##_common_win_alarm_timer != NULL);				\
+	if (pthread_create(&prefix##_common_win_alarm_thread,				\
+			   NULL,							\
+			   prefix##_common_win_alarm,					\
+			   NULL) != 0)							\
 		ck_error("ERROR: Failed to create common_win_alarm thread.\n");
 #else
-#define	COMMON_ALARM_DECLARE_GLOBAL(alarm_event_name, flag_name)
-#define	COMMON_ALARM_DECLARE_LOCAL(alarm_event_name, local_name)	\
-	int alarm_event_name = 0;
-#define	COMMON_ALARM_INIT(alarm_event_name, duration)
+#define	COMMON_ALARM_DECLARE_GLOBAL(prefix, alarm_event_name, flag_name)
+#define	COMMON_ALARM_DECLARE_LOCAL(prefix, alarm_event_name)	\
+	int prefix##_alarm_event_name = 0;
+#define	COMMON_ALARM_INIT(prefix, alarm_event_name, duration)
 #endif
 
 struct affinity {