SC_JACK_DEFAULT env too long

Questions
4

this is great for me !
I need to run:"SC_JACK_DEFAULT_OUTPUTS".unsetenv;"SC_JACK_DEFAULT_INPUTS".unsetenv
before s.boot to avoid autoconnection. and then I run

[
  ["from_here", "to_there"],
  ["from_here", "to_there"],
].do({|v|  format("jack_connect % %", *v).unixCmd })