these 4 derivations will be built:
  /nix/store/vsnb1v1swq521d9qi5vc2q6krnwg39wq-clan-cli-source.drv
  /nix/store/4mpwh4zk13mnhh1rwl6cpv5ib63f763v-clan-cli.drv
  /nix/store/nzbc1q144xj4dzvhg54mpwrnlqyl1m02-tofu.drv
  /nix/store/4n4lhw7358bxjj0ni8sbl9wb9vqblql1-dns.drv