Index: apc_lock.c
===================================================================
--- apcu-5.1.11/apc_lock.c
+++ apcu-5.1.11/apc_lock.c	2018-11-22 11:41:44.774342238 +0100
@@ -279,7 +279,7 @@
 }
 
 PHP_APCU_API zend_bool apc_lock_create(apc_lock_t *lock) {
-	char lock_path[] = "/tmp/.apc.XXXXXX";
+	char lock_path[] = "/var/lib/php-apcu/.apc.XXXXXX";
 	mktemp(lock_path);
 	*lock = open(lock_path, O_RDWR|O_CREAT, 0666);
 	if (*lock > 0) {