{ ... }: let gua_pref = "2001:14ba:a090:39"; in { networking = { jool = { enable = true; siit.default = { global.pool6 = "${gua_pref}46::/96"; # Explicit address mappings eamt = [ { "ipv6 prefix" = "${gua_pref}d1:be24:11ff:fe42:dd76/128"; "ipv4 prefix" = "192.168.250.10/32"; } ]; }; }; }; }