these 3 derivations will be built:
  /nix/store/8xkgy7cpm7p9fs7qc198c1074dx22jhh-source.drv
  /nix/store/rrhb7hbg996knykb36hm9j2647zy46nf-mcptoon-0.8.27.drv
  /nix/store/qmhi54pgcb940zkn2inps8kwa1ysqbqv-check-mcptoon.drv