these 3 derivations will be built:
  /nix/store/zd643fgnqws9gmwmyv9dhiyz0vwsmxdq-clan-cli-source.drv
  /nix/store/x8fa8pp9cvkkmsj7z7r3pqvacad4v4gp-clan-cli.drv
  /nix/store/d7nx4b9ak2dbaabz77vicpc0zqhqm8gv-nix-shell.drv