this derivation will be built:
  /nix/store/vl57cps0s428gm043ilhdqj64nw3k1ih-ldmud-3.6.6.drv
this path will be fetched (23.1 KiB download, 110.0 KiB unpacked):
  /nix/store/8cvpx1zishvhx6r46p8ryhq979hmd8pj-json-c-0.16-dev