these 2 derivations will be built:
  /nix/store/zrsxmkwgdhv7ss4n4i5llvkzfspcfd0d-mcptoon-0.8.1.drv
  /nix/store/0llr70sv4zl8cdk1z9b5hyjksw0x4nkr-check-mcptoon.drv