these 3 derivations will be built:
  /nix/store/kcf9r1f8kdr6684pmym7nj6glvydiyzc-clan-cli-source.drv
  /nix/store/03klfhlmp79887xn23caqsw34q35ms92-clan-cli.drv
  /nix/store/qp6k3knnwhh0470s9jrlrlhnqizvh63y-nix-shell.drv