We mark being in the exec'd process by a daemon name argument of
form "--daemon=\nFD0,FD1\nNAME" where FD are the pipe file descriptors,
NAME is the original daemon name, if any. */
-#if defined (NS_IMPL_COCOA) || defined (HAVE_NTGUI)
+#if defined (NS_IMPL_COCOA) || (defined (HAVE_NTGUI) && defined (CYGWIN))
# define DAEMON_MUST_EXEC
#endif