these 3 derivations will be built:
  /nix/store/pgvvw5wkzjhj46py5x9119sw9yjxx4nv-clan-cli-source.drv
  /nix/store/fr14dd35a36xy4pqashi4grgj0g9dz10-clan-cli.drv
  /nix/store/2fhjrgmq8r3l1jal5m4x06ai1qcvlfqz-nix-shell.drv