these 3 derivations will be built:
  /nix/store/d7bxqbsrhzs0qb5148ha8z7hr3snxg5a-ccusage-20.0.42-vendor.drv
  /nix/store/wjklcs94yw5widrxklvnc2xa7b8fdkgb-ccusage-20.0.42.drv
  /nix/store/cr02zk3rn7v4m6z2fkr42nj8hlbp3rn5-check-ccusage.drv