oh well, thanks. So, it's all a matter of calling multiplex at least once. As for the "standalone" build, I think I will stick to the standard procedure, as I'm not able to do what hans says.
athos
> [mux~] is part of zexy.and does not load when zexy is compiled as single-object externals
(--enable-library=no). When creating [zexy/mux~], I get:
load_object: Symbol "mux_tilde_setup" not found
zexy/mux~
error: ... couldn't create
Accordingly, it does load after having created [zexy/multiplex~]