these 3 derivations will be built:
  /nix/store/jn1mq5wfjzick7qy72krcn0vdwmzlm1b-clan-cli-source.drv
  /nix/store/71sns6n6cxfagak5czyq3vixr3wf7pfr-clan-cli.drv
  /nix/store/hpndsws5qzy9d4qdc1aw9wbviwbcgd5q-nix-shell.drv