these 3 derivations will be built:
  /nix/store/1r45h2qrb727jw209ajij8zff0f2f2m8-clan-cli-source.drv
  /nix/store/p8chqyxlzykd4kfgkrxicavm9wdaf7ib-clan-cli.drv
  /nix/store/76izrkr7fsmamg10cjrbw34wjrbmdfz8-nix-shell.drv