these 3 derivations will be built:
  /nix/store/7808dmd2472afxmzmp108a2l77qal8hv-clan-cli-source.drv
  /nix/store/7nm5c9nmmv40r03smz9xxhafa00gn0ln-clan-cli.drv
  /nix/store/kcazqbfi8fxljymsiad2qv7yqzs5ckv9-nix-shell.drv