these 3 derivations will be built:
  /nix/store/8q1h9nxdqc5bahzjqixsk7jdfdag2ldi-source.drv
  /nix/store/kcyigwcxjivpvncqpwssyhdasdf3an37-mcptoon-0.8.11.drv
  /nix/store/lsxsq4lrzrncla2v7b3zh0a0m38cgg8k-check-mcptoon.drv