these 3 derivations will be built:
  /nix/store/8fg3y0qs3a7rbkig3vzmpi1cwad3fhqy-clan-cli-source.drv
  /nix/store/75yd8j1v5smnf278mdappqqzy4cwv9sg-clan-cli.drv
  /nix/store/sk5wq047h9r46z7zvkpdnb7k7inhfb4g-nix-shell.drv