{ ... }: { fileSystems = { "/export/roms" = { device = "/mnt/data/willifan"; options = [ "bind" ]; }; }; services.nfs.server = { enable = true; exports = '' /export *(rw,fsid=0,no_subtree_check) /export/roms *(rw,nohide,insecure,no_subtree_check) ''; }; networking.firewall.allowedTCPPorts = [ 2049 ]; }