void _debug_vprintf(const char *format, va_list ap)
{
-#if defined(PIPE_OS_WINDOWS) || defined(PIPE_OS_EMBEDDED)
+#if defined(PIPE_OS_WINDOWS) || defined(PIPE_SUBSYSTEM_EMBEDDED)
/* We buffer until we find a newline. */
static char buf[4096] = {'\0'};
size_t len = strlen(buf);