these 3 derivations will be built:
  /nix/store/v96r5pq0dxyy4afjnvck1650w2sgijjd-clan-cli-source.drv
  /nix/store/8p4lkfzg9ww0132ail93k7ah3cx14gsf-clan-cli.drv
  /nix/store/4nr94xfxsw930a637nqgwx0cxv45v8p6-nix-shell.drv