these 3 derivations will be built:
  /nix/store/aqb9p2kwh0qazklhmn7g2299bspjmlsc-clan-cli-source.drv
  /nix/store/7cplwb3vvrmiw7nm3rkalmsi5wlw6mlf-clan-cli.drv
  /nix/store/d76103y2v600k4x97jc8115ivds6nj9b-nix-shell.drv