these 4 derivations will be built:
  /nix/store/gj22wp123g95hx0brbf70bx331dglljx-clan-runtime.drv
  /nix/store/yvd466m88ij3sna708gqs268kvad8sa2-clan-cli-source.drv
  /nix/store/mxpmbr7h49xkca0kabvi1s50rcchqxji-clan-cli.drv
  /nix/store/swsffwmpcjw81ak31fg9y6zf2041wm7b-nix-shell.drv