these 3 derivations will be built:
  /nix/store/fvi4insdr8c033kkvkqb4aknffb31k09-clan-cli-source.drv
  /nix/store/ar2742cnmvb1nwbcippw3xjnxd3z01if-clan-cli.drv
  /nix/store/vzfjssbfjrmdfyq596s6l7fj4m8bmihp-nix-shell.drv