+# In Autotools this has a different default on QNX, but there seems little
+# point in replicating that here; if you're on an unusual Unix, use Autotools.
+set (DEFAULT_MESSAGE_UNIX_FDS 1024)
+
+# This won't work on Windows. It's not meant to - the system bus is
+# meaningless on Windows anyway.
+#
+# This has to be suitable for hard-coding in client libraries as well as
+# in the dbus-daemon's configuration, so it has to be valid to listen on
+# and also to connect to. If this ever changes, it'll need to be split into
+# two variables, one for the listening address and one for the connecting
+# address.
+set (DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "unix:path=${EXPANDED_LOCALSTATEDIR}/run/dbus/system_bus_socket" CACHE STRING "system bus default address")