these 3 derivations will be built:
  /nix/store/x07qwq3mzwpqwyf3ldxkwfb24cdq6rw0-clan-cli-source.drv
  /nix/store/r38jfwi9dfd4jn8gsxnjkacyvsld82l6-clan-cli.drv
  /nix/store/v9di7kq17x4bm7bq6zxi78vdcknbk6wk-nix-shell.drv