these 5 derivations will be built:
  /nix/store/7naxnysm71d4cy57k2mwqx3p86d0nz9k-clan-runtime.drv
  /nix/store/8clz5m84px229i9cxc4jhl5zlfd9yf1a-clan-cli-source.drv
  /nix/store/01l6km9l9mjhzxqzjijbwa8aw4iq3x73-clan-cli.drv
  /nix/store/jaqsmzz2fzgblqy6rxwrncv0jpj48hyi-closure-info.drv
  /nix/store/bvcbd22vskd24vq4d6w91qrjshn0xmcw-check-vars.drv