these 4 derivations will be built:
  /nix/store/aqb9p2kwh0qazklhmn7g2299bspjmlsc-clan-cli-source.drv
  /nix/store/7cplwb3vvrmiw7nm3rkalmsi5wlw6mlf-clan-cli.drv
  /nix/store/pm6zbv5hr3ri3bzhrlq4lac9smakh2cv-tofu.drv
  /nix/store/lmqcjwgqbywfkylpkjnll8jy505s952a-cache-new.drv