these 3 derivations will be built:
  /nix/store/vm4ld5six0ay96g78ra2prv8byawargw-clan-cli-source.drv
  /nix/store/8d0jdv8qf1mvf5v2njid5xdshf55l3yb-clan-cli.drv
  /nix/store/sir05fza5b89ynb4a5chg0fcs8h1kzyy-nix-shell.drv