these 3 derivations will be built:
  /nix/store/66ny5n2dfvs13jkz7ya5zq474zvglkcn-clan-cli-source.drv
  /nix/store/d87kfh9jf21kvngbabhr275y1hrlwir3-clan-cli.drv
  /nix/store/i19afm4m7db07ccqsbybmcvdm1x23sil-nix-shell.drv