these 3 derivations will be built:
  /nix/store/s79mdply7jwxvlbh36zf5n93bqm4nd0h-source.drv
  /nix/store/2b3z86a4f1c99yzxizqx4l9r6ydw5gc0-semble-0.6.1.drv
  /nix/store/sncidfdir24pq9cqnpx74ir4qpmkfgr0-check-semble.drv